diff --git a/Casbin.Benchmark/TestHelper.cs b/Casbin.Benchmark/TestHelper.cs
index 95f70c4..83874ba 100644
--- a/Casbin.Benchmark/TestHelper.cs
+++ b/Casbin.Benchmark/TestHelper.cs
@@ -6,7 +6,7 @@ public static class TestHelper
     {
         public static string GetTestFilePath(string fileName)
         {
-            return Path.Combine("examples", fileName);
+            return Path.Combine("Examples", fileName);
         }
     }
 }
diff --git a/Casbin.UnitTests/Casbin.UnitTests.csproj b/Casbin.UnitTests/Casbin.UnitTests.csproj
index fa89d12..3ada8fd 100644
--- a/Casbin.UnitTests/Casbin.UnitTests.csproj
+++ b/Casbin.UnitTests/Casbin.UnitTests.csproj
@@ -4,7 +4,7 @@
     <TargetFrameworks>net9.0;net8.0;net7.0;net6.0;net5.0;netcoreapp3.1;net462;net461;net452</TargetFrameworks>
     <DebugType>full</DebugType>
     <IsPackable>false</IsPackable>
-    <LangVersion>10.0</LangVersion>
+    <LangVersion>latest</LangVersion>
     <EnforceCodeStyleInBuild>false</EnforceCodeStyleInBuild>
   </PropertyGroup>
 
diff --git a/Casbin.UnitTests/examples/abac_comment.conf b/Casbin.UnitTests/Examples/abac_comment.conf
similarity index 100%
rename from Casbin.UnitTests/examples/abac_comment.conf
rename to Casbin.UnitTests/Examples/abac_comment.conf
diff --git a/Casbin.UnitTests/examples/abac_model.conf b/Casbin.UnitTests/Examples/abac_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/abac_model.conf
rename to Casbin.UnitTests/Examples/abac_model.conf
diff --git a/Casbin.UnitTests/examples/abac_rule_model.conf b/Casbin.UnitTests/Examples/abac_rule_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/abac_rule_model.conf
rename to Casbin.UnitTests/Examples/abac_rule_model.conf
diff --git a/Casbin.UnitTests/examples/abac_rule_policy.csv b/Casbin.UnitTests/Examples/abac_rule_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/abac_rule_policy.csv
rename to Casbin.UnitTests/Examples/abac_rule_policy.csv
diff --git a/Casbin.UnitTests/examples/abac_with_dynamic_value_type_model.conf b/Casbin.UnitTests/Examples/abac_with_dynamic_value_type_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/abac_with_dynamic_value_type_model.conf
rename to Casbin.UnitTests/Examples/abac_with_dynamic_value_type_model.conf
diff --git a/Casbin.UnitTests/examples/abac_with_dynamic_value_type_policy.csv b/Casbin.UnitTests/Examples/abac_with_dynamic_value_type_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/abac_with_dynamic_value_type_policy.csv
rename to Casbin.UnitTests/Examples/abac_with_dynamic_value_type_policy.csv
diff --git a/Casbin.UnitTests/examples/backslash_feed_model.conf b/Casbin.UnitTests/Examples/backslash_feed_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/backslash_feed_model.conf
rename to Casbin.UnitTests/Examples/backslash_feed_model.conf
diff --git a/Casbin.UnitTests/examples/backslash_feed_policy.csv b/Casbin.UnitTests/Examples/backslash_feed_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/backslash_feed_policy.csv
rename to Casbin.UnitTests/Examples/backslash_feed_policy.csv
diff --git a/Casbin.UnitTests/examples/basic_inverse_policy.csv b/Casbin.UnitTests/Examples/basic_inverse_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/basic_inverse_policy.csv
rename to Casbin.UnitTests/Examples/basic_inverse_policy.csv
diff --git a/Casbin.UnitTests/examples/basic_model.conf b/Casbin.UnitTests/Examples/basic_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/basic_model.conf
rename to Casbin.UnitTests/Examples/basic_model.conf
diff --git a/Casbin.UnitTests/examples/basic_policy.csv b/Casbin.UnitTests/Examples/basic_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/basic_policy.csv
rename to Casbin.UnitTests/Examples/basic_policy.csv
diff --git a/Casbin.UnitTests/examples/basic_policy_for_async_adapter_test.csv b/Casbin.UnitTests/Examples/basic_policy_for_async_adapter_test.csv
similarity index 100%
rename from Casbin.UnitTests/examples/basic_policy_for_async_adapter_test.csv
rename to Casbin.UnitTests/Examples/basic_policy_for_async_adapter_test.csv
diff --git a/Casbin.UnitTests/examples/basic_with_root_model.conf b/Casbin.UnitTests/Examples/basic_with_root_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/basic_with_root_model.conf
rename to Casbin.UnitTests/Examples/basic_with_root_model.conf
diff --git a/Casbin.UnitTests/examples/basic_without_resources_model.conf b/Casbin.UnitTests/Examples/basic_without_resources_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/basic_without_resources_model.conf
rename to Casbin.UnitTests/Examples/basic_without_resources_model.conf
diff --git a/Casbin.UnitTests/examples/basic_without_resources_policy.csv b/Casbin.UnitTests/Examples/basic_without_resources_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/basic_without_resources_policy.csv
rename to Casbin.UnitTests/Examples/basic_without_resources_policy.csv
diff --git a/Casbin.UnitTests/examples/basic_without_users_model.conf b/Casbin.UnitTests/Examples/basic_without_users_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/basic_without_users_model.conf
rename to Casbin.UnitTests/Examples/basic_without_users_model.conf
diff --git a/Casbin.UnitTests/examples/basic_without_users_policy.csv b/Casbin.UnitTests/Examples/basic_without_users_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/basic_without_users_policy.csv
rename to Casbin.UnitTests/Examples/basic_without_users_policy.csv
diff --git a/Casbin.UnitTests/examples/comma_quotations_model.conf b/Casbin.UnitTests/Examples/comma_quotations_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/comma_quotations_model.conf
rename to Casbin.UnitTests/Examples/comma_quotations_model.conf
diff --git a/Casbin.UnitTests/examples/comma_quotations_policy.csv b/Casbin.UnitTests/Examples/comma_quotations_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/comma_quotations_policy.csv
rename to Casbin.UnitTests/Examples/comma_quotations_policy.csv
diff --git a/Casbin.UnitTests/examples/group_with_domain_model.conf b/Casbin.UnitTests/Examples/group_with_domain_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/group_with_domain_model.conf
rename to Casbin.UnitTests/Examples/group_with_domain_model.conf
diff --git a/Casbin.UnitTests/examples/group_with_domain_policy.csv b/Casbin.UnitTests/Examples/group_with_domain_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/group_with_domain_policy.csv
rename to Casbin.UnitTests/Examples/group_with_domain_policy.csv
diff --git a/Casbin.UnitTests/examples/ipmatch_model.conf b/Casbin.UnitTests/Examples/ipmatch_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/ipmatch_model.conf
rename to Casbin.UnitTests/Examples/ipmatch_model.conf
diff --git a/Casbin.UnitTests/examples/ipmatch_policy.csv b/Casbin.UnitTests/Examples/ipmatch_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/ipmatch_policy.csv
rename to Casbin.UnitTests/Examples/ipmatch_policy.csv
diff --git a/Casbin.UnitTests/examples/keymatch2_model.conf b/Casbin.UnitTests/Examples/keymatch2_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/keymatch2_model.conf
rename to Casbin.UnitTests/Examples/keymatch2_model.conf
diff --git a/Casbin.UnitTests/examples/keymatch2_policy.csv b/Casbin.UnitTests/Examples/keymatch2_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/keymatch2_policy.csv
rename to Casbin.UnitTests/Examples/keymatch2_policy.csv
diff --git a/Casbin.UnitTests/examples/keymatch_custom_model.conf b/Casbin.UnitTests/Examples/keymatch_custom_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/keymatch_custom_model.conf
rename to Casbin.UnitTests/Examples/keymatch_custom_model.conf
diff --git a/Casbin.UnitTests/examples/keymatch_model.conf b/Casbin.UnitTests/Examples/keymatch_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/keymatch_model.conf
rename to Casbin.UnitTests/Examples/keymatch_model.conf
diff --git a/Casbin.UnitTests/examples/keymatch_policy.csv b/Casbin.UnitTests/Examples/keymatch_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/keymatch_policy.csv
rename to Casbin.UnitTests/Examples/keymatch_policy.csv
diff --git a/Casbin.UnitTests/examples/multiple_type_model.conf b/Casbin.UnitTests/Examples/multiple_type_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/multiple_type_model.conf
rename to Casbin.UnitTests/Examples/multiple_type_model.conf
diff --git a/Casbin.UnitTests/examples/multiple_type_policy.csv b/Casbin.UnitTests/Examples/multiple_type_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/multiple_type_policy.csv
rename to Casbin.UnitTests/Examples/multiple_type_policy.csv
diff --git a/Casbin.UnitTests/examples/priority_explicit_deny_override_model.conf b/Casbin.UnitTests/Examples/priority_explicit_deny_override_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/priority_explicit_deny_override_model.conf
rename to Casbin.UnitTests/Examples/priority_explicit_deny_override_model.conf
diff --git a/Casbin.UnitTests/examples/priority_explicit_deny_override_policy.csv b/Casbin.UnitTests/Examples/priority_explicit_deny_override_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/priority_explicit_deny_override_policy.csv
rename to Casbin.UnitTests/Examples/priority_explicit_deny_override_policy.csv
diff --git a/Casbin.UnitTests/examples/priority_explicit_model.conf b/Casbin.UnitTests/Examples/priority_explicit_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/priority_explicit_model.conf
rename to Casbin.UnitTests/Examples/priority_explicit_model.conf
diff --git a/Casbin.UnitTests/examples/priority_explicit_policy.csv b/Casbin.UnitTests/Examples/priority_explicit_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/priority_explicit_policy.csv
rename to Casbin.UnitTests/Examples/priority_explicit_policy.csv
diff --git a/Casbin.UnitTests/examples/priority_indeterminate_policy.csv b/Casbin.UnitTests/Examples/priority_indeterminate_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/priority_indeterminate_policy.csv
rename to Casbin.UnitTests/Examples/priority_indeterminate_policy.csv
diff --git a/Casbin.UnitTests/examples/priority_model.conf b/Casbin.UnitTests/Examples/priority_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/priority_model.conf
rename to Casbin.UnitTests/Examples/priority_model.conf
diff --git a/Casbin.UnitTests/examples/priority_policy.csv b/Casbin.UnitTests/Examples/priority_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/priority_policy.csv
rename to Casbin.UnitTests/Examples/priority_policy.csv
diff --git a/Casbin.UnitTests/examples/rbac_comment.conf b/Casbin.UnitTests/Examples/rbac_comment.conf
similarity index 100%
rename from Casbin.UnitTests/examples/rbac_comment.conf
rename to Casbin.UnitTests/Examples/rbac_comment.conf
diff --git a/Casbin.UnitTests/examples/rbac_in_operator_model.conf b/Casbin.UnitTests/Examples/rbac_in_operator_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/rbac_in_operator_model.conf
rename to Casbin.UnitTests/Examples/rbac_in_operator_model.conf
diff --git a/Casbin.UnitTests/examples/rbac_in_operator_policy.csv b/Casbin.UnitTests/Examples/rbac_in_operator_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/rbac_in_operator_policy.csv
rename to Casbin.UnitTests/Examples/rbac_in_operator_policy.csv
diff --git a/Casbin.UnitTests/examples/rbac_model.conf b/Casbin.UnitTests/Examples/rbac_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/rbac_model.conf
rename to Casbin.UnitTests/Examples/rbac_model.conf
diff --git a/Casbin.UnitTests/examples/rbac_multiple_eval_model.conf b/Casbin.UnitTests/Examples/rbac_multiple_eval_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/rbac_multiple_eval_model.conf
rename to Casbin.UnitTests/Examples/rbac_multiple_eval_model.conf
diff --git a/Casbin.UnitTests/examples/rbac_multiple_eval_policy.csv b/Casbin.UnitTests/Examples/rbac_multiple_eval_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/rbac_multiple_eval_policy.csv
rename to Casbin.UnitTests/Examples/rbac_multiple_eval_policy.csv
diff --git a/Casbin.UnitTests/examples/rbac_multiple_rolemanager_model.conf b/Casbin.UnitTests/Examples/rbac_multiple_rolemanager_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/rbac_multiple_rolemanager_model.conf
rename to Casbin.UnitTests/Examples/rbac_multiple_rolemanager_model.conf
diff --git a/Casbin.UnitTests/examples/rbac_multiple_rolemanager_policy.csv b/Casbin.UnitTests/Examples/rbac_multiple_rolemanager_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/rbac_multiple_rolemanager_policy.csv
rename to Casbin.UnitTests/Examples/rbac_multiple_rolemanager_policy.csv
diff --git a/Casbin.UnitTests/examples/rbac_policy.csv b/Casbin.UnitTests/Examples/rbac_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/rbac_policy.csv
rename to Casbin.UnitTests/Examples/rbac_policy.csv
diff --git a/Casbin.UnitTests/examples/rbac_policy_for_async_watcher_test.csv b/Casbin.UnitTests/Examples/rbac_policy_for_async_watcher_test.csv
similarity index 100%
rename from Casbin.UnitTests/examples/rbac_policy_for_async_watcher_test.csv
rename to Casbin.UnitTests/Examples/rbac_policy_for_async_watcher_test.csv
diff --git a/Casbin.UnitTests/examples/rbac_policy_for_watcher_test.csv b/Casbin.UnitTests/Examples/rbac_policy_for_watcher_test.csv
similarity index 100%
rename from Casbin.UnitTests/examples/rbac_policy_for_watcher_test.csv
rename to Casbin.UnitTests/Examples/rbac_policy_for_watcher_test.csv
diff --git a/Casbin.UnitTests/examples/rbac_with_deny_model.conf b/Casbin.UnitTests/Examples/rbac_with_deny_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/rbac_with_deny_model.conf
rename to Casbin.UnitTests/Examples/rbac_with_deny_model.conf
diff --git a/Casbin.UnitTests/examples/rbac_with_deny_policy.csv b/Casbin.UnitTests/Examples/rbac_with_deny_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/rbac_with_deny_policy.csv
rename to Casbin.UnitTests/Examples/rbac_with_deny_policy.csv
diff --git a/Casbin.UnitTests/examples/rbac_with_domains_model.conf b/Casbin.UnitTests/Examples/rbac_with_domains_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/rbac_with_domains_model.conf
rename to Casbin.UnitTests/Examples/rbac_with_domains_model.conf
diff --git a/Casbin.UnitTests/examples/rbac_with_domains_policy.csv b/Casbin.UnitTests/Examples/rbac_with_domains_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/rbac_with_domains_policy.csv
rename to Casbin.UnitTests/Examples/rbac_with_domains_policy.csv
diff --git a/Casbin.UnitTests/examples/rbac_with_domains_policy2.csv b/Casbin.UnitTests/Examples/rbac_with_domains_policy2.csv
similarity index 100%
rename from Casbin.UnitTests/examples/rbac_with_domains_policy2.csv
rename to Casbin.UnitTests/Examples/rbac_with_domains_policy2.csv
diff --git a/Casbin.UnitTests/examples/rbac_with_hierarchy_policy.csv b/Casbin.UnitTests/Examples/rbac_with_hierarchy_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/rbac_with_hierarchy_policy.csv
rename to Casbin.UnitTests/Examples/rbac_with_hierarchy_policy.csv
diff --git a/Casbin.UnitTests/examples/rbac_with_hierarchy_with_domains_policy.csv b/Casbin.UnitTests/Examples/rbac_with_hierarchy_with_domains_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/rbac_with_hierarchy_with_domains_policy.csv
rename to Casbin.UnitTests/Examples/rbac_with_hierarchy_with_domains_policy.csv
diff --git a/Casbin.UnitTests/examples/rbac_with_index_matcher_model.conf b/Casbin.UnitTests/Examples/rbac_with_index_matcher_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/rbac_with_index_matcher_model.conf
rename to Casbin.UnitTests/Examples/rbac_with_index_matcher_model.conf
diff --git a/Casbin.UnitTests/examples/rbac_with_index_matcher_policy.csv b/Casbin.UnitTests/Examples/rbac_with_index_matcher_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/rbac_with_index_matcher_policy.csv
rename to Casbin.UnitTests/Examples/rbac_with_index_matcher_policy.csv
diff --git a/Casbin.UnitTests/examples/rbac_with_not_deny_model.conf b/Casbin.UnitTests/Examples/rbac_with_not_deny_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/rbac_with_not_deny_model.conf
rename to Casbin.UnitTests/Examples/rbac_with_not_deny_model.conf
diff --git a/Casbin.UnitTests/examples/rbac_with_resource_roles_model.conf b/Casbin.UnitTests/Examples/rbac_with_resource_roles_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/rbac_with_resource_roles_model.conf
rename to Casbin.UnitTests/Examples/rbac_with_resource_roles_model.conf
diff --git a/Casbin.UnitTests/examples/rbac_with_resource_roles_policy.csv b/Casbin.UnitTests/Examples/rbac_with_resource_roles_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/rbac_with_resource_roles_policy.csv
rename to Casbin.UnitTests/Examples/rbac_with_resource_roles_policy.csv
diff --git a/Casbin.UnitTests/examples/saa_model.conf b/Casbin.UnitTests/Examples/saa_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/saa_model.conf
rename to Casbin.UnitTests/Examples/saa_model.conf
diff --git a/Casbin.UnitTests/examples/saa_rbac_policy.csv b/Casbin.UnitTests/Examples/saa_rbac_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/saa_rbac_policy.csv
rename to Casbin.UnitTests/Examples/saa_rbac_policy.csv
diff --git a/Casbin.UnitTests/examples/subject_priority_model.conf b/Casbin.UnitTests/Examples/subject_priority_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/subject_priority_model.conf
rename to Casbin.UnitTests/Examples/subject_priority_model.conf
diff --git a/Casbin.UnitTests/examples/subject_priority_model_with_domain.conf b/Casbin.UnitTests/Examples/subject_priority_model_with_domain.conf
similarity index 100%
rename from Casbin.UnitTests/examples/subject_priority_model_with_domain.conf
rename to Casbin.UnitTests/Examples/subject_priority_model_with_domain.conf
diff --git a/Casbin.UnitTests/examples/subject_priority_policy.csv b/Casbin.UnitTests/Examples/subject_priority_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/subject_priority_policy.csv
rename to Casbin.UnitTests/Examples/subject_priority_policy.csv
diff --git a/Casbin.UnitTests/examples/subject_priority_policy_with_domain.csv b/Casbin.UnitTests/Examples/subject_priority_policy_with_domain.csv
similarity index 100%
rename from Casbin.UnitTests/examples/subject_priority_policy_with_domain.csv
rename to Casbin.UnitTests/Examples/subject_priority_policy_with_domain.csv
diff --git a/Casbin.UnitTests/examples/support_count_model.conf b/Casbin.UnitTests/Examples/support_count_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/support_count_model.conf
rename to Casbin.UnitTests/Examples/support_count_model.conf
diff --git a/Casbin.UnitTests/examples/tabs_model.conf b/Casbin.UnitTests/Examples/tabs_model.conf
similarity index 100%
rename from Casbin.UnitTests/examples/tabs_model.conf
rename to Casbin.UnitTests/Examples/tabs_model.conf
diff --git a/Casbin.UnitTests/examples/tabs_policy.csv b/Casbin.UnitTests/Examples/tabs_policy.csv
similarity index 100%
rename from Casbin.UnitTests/examples/tabs_policy.csv
rename to Casbin.UnitTests/Examples/tabs_policy.csv
diff --git a/Casbin.UnitTests/examples/tokens_with_substring_relation_abac.conf b/Casbin.UnitTests/Examples/tokens_with_substring_relation_abac.conf
similarity index 100%
rename from Casbin.UnitTests/examples/tokens_with_substring_relation_abac.conf
rename to Casbin.UnitTests/Examples/tokens_with_substring_relation_abac.conf
diff --git a/Casbin.UnitTests/examples/tokens_with_substring_relation_abac.csv b/Casbin.UnitTests/Examples/tokens_with_substring_relation_abac.csv
similarity index 100%
rename from Casbin.UnitTests/examples/tokens_with_substring_relation_abac.csv
rename to Casbin.UnitTests/Examples/tokens_with_substring_relation_abac.csv
diff --git a/Casbin.UnitTests/examples/tokens_with_substring_relation_rbac.conf b/Casbin.UnitTests/Examples/tokens_with_substring_relation_rbac.conf
similarity index 100%
rename from Casbin.UnitTests/examples/tokens_with_substring_relation_rbac.conf
rename to Casbin.UnitTests/Examples/tokens_with_substring_relation_rbac.conf
diff --git a/Casbin.UnitTests/examples/tokens_with_substring_relation_rbac.csv b/Casbin.UnitTests/Examples/tokens_with_substring_relation_rbac.csv
similarity index 100%
rename from Casbin.UnitTests/examples/tokens_with_substring_relation_rbac.csv
rename to Casbin.UnitTests/Examples/tokens_with_substring_relation_rbac.csv
diff --git a/Casbin.UnitTests/GenericTests/GenericFunctionTest.cs b/Casbin.UnitTests/GenericTests/GenericFunctionTest.cs
new file mode 100644
index 0000000..0b46474
--- /dev/null
+++ b/Casbin.UnitTests/GenericTests/GenericFunctionTest.cs
@@ -0,0 +1,69 @@
+using System;
+using Casbin.Model;
+using Casbin.UnitTests.Util;
+using DynamicExpresso;
+using Xunit;
+
+namespace Casbin.UnitTests.GenericTests;
+
+public class GenericFunctionTest
+{
+    [Fact]
+    public void TestGenericFunction()
+    {
+        Interpreter interpreter = new();
+        RequestValues<string, int> r = Request.CreateValues("A", 1);
+        PolicyValues<string, int> p = Policy.CreateValues("A", 1);
+        interpreter.SetFunction("equal", new Func<string, string, bool>(
+            (a, b) => a == b)
+        );
+        interpreter.SetFunction("equal", new Func<int, int, bool>(
+            (a, b) => a == b)
+        );
+
+        Func<RequestValues<string, int>, PolicyValues<string, int>, bool> func1 =
+            ExpressionUtil.Compile(interpreter, "equal(r.Value2, p.Value2) && equal(r.Value2, p.Value2)",
+                nameof(r), in r, nameof(p), in p);
+
+        Assert.True(func1(Request.CreateValues("A", 1), Policy.CreateValues("A", 1)));
+        Assert.False(func1(Request.CreateValues("A", 1), Policy.CreateValues("A", 2)));
+        Assert.False(func1(Request.CreateValues("B", 1), Policy.CreateValues("B", 2)));
+    }
+
+#if !NET452
+    [Fact]
+    public void TestGenericFunctionModel()
+    {
+        Enforcer e = new Enforcer(DefaultModel.NewModelFromText(
+            """
+                [request_definition]
+                r = obj1, obj2
+
+                [policy_definition]
+                p = _
+
+                [policy_effect]
+                e = some(where (p.eft == allow))
+
+                [matchers]
+                m = max(r.obj1, r.obj2) > 2
+            """));
+
+        e.AddFunction("max", new Func<int, int, int>(
+            // ReSharper disable once ConvertClosureToMethodGroup
+            (a, b) => Math.Max(a, b)
+        ));
+        Assert.True(e.Enforce(1, 3));
+        Assert.False(e.Enforce(1, 2));
+        Assert.False(e.Enforce("1", "111"));
+
+        e.AddFunction("max", new Func<string, string, int>(
+            (a, b) => Math.Max(a.Length, b.Length)
+        ));
+        Assert.True(e.Enforce(1, 3));
+        Assert.False(e.Enforce(1, 2));
+        Assert.True(e.Enforce("1", "111"));
+    }
+#endif
+
+}
diff --git a/Casbin.UnitTests/GenericTests/GenericMatcherTest.cs b/Casbin.UnitTests/GenericTests/GenericMatcherTest.cs
index e533c3b..fce505a 100644
--- a/Casbin.UnitTests/GenericTests/GenericMatcherTest.cs
+++ b/Casbin.UnitTests/GenericTests/GenericMatcherTest.cs
@@ -1,5 +1,7 @@
 using System;
+using Casbin.Evaluation;
 using Casbin.Model;
+using Casbin.UnitTests.Util;
 using DynamicExpresso;
 using Xunit;
 
@@ -10,11 +12,12 @@ public class GenericMatcherTest
     [Fact]
     public void TestGenericMatcher()
     {
+        Interpreter interpreter = new();
         RequestValues<string, int> r = Request.CreateValues("A", 1);
         PolicyValues<string, int> p = Policy.CreateValues("A", 1);
-        Func<RequestValues<string, int>, PolicyValues<string, int>, bool> func1 = Compile(
-            "r.Value1 == p.Value1 && r.Value2 == p.Value2",
-            nameof(r), in r, nameof(p), in p);
+        Func<RequestValues<string, int>, PolicyValues<string, int>, bool> func1 =
+            ExpressionUtil.Compile(interpreter, "r.Value1 == p.Value1 && r.Value2 == p.Value2",
+                nameof(r), in r, nameof(p), in p);
 
         Assert.True(func1(Request.CreateValues("A", 1), Policy.CreateValues("A", 1)));
         Assert.False(func1(Request.CreateValues("A", 1), Policy.CreateValues("A", 2)));
@@ -22,25 +25,15 @@ public void TestGenericMatcher()
 
         RequestValues<string, int, string> r2 = Request.CreateValues("A", 1, "read");
         PolicyValues<string, int, string> p2 = Policy.CreateValues("A", 1, "read");
-        Func<RequestValues<string, int, string>, PolicyValues<string, int, string>, bool> func2 = Compile(
-            "r2.Value1 == p2.Value1 && r2.Value2 == p2.Value2 && r2.Value3 == p2.Value3",
-            nameof(r2), in r2, nameof(p2), in p2);
+        Func<RequestValues<string, int, string>, PolicyValues<string, int, string>, bool> func2 =
+            ExpressionUtil.Compile(interpreter, "r2.Value1 == p2.Value1 && r2.Value2 == p2.Value2 && r2.Value3 == p2.Value3",
+                nameof(r2), in r2, nameof(p2), in p2);
 
         Assert.True(func2(Request.CreateValues("A", 1, "read"), Policy.CreateValues("A", 1, "read")));
         Assert.False(func2(Request.CreateValues("A", 1, "read"), Policy.CreateValues("A", 2, "read")));
         Assert.False(func2(Request.CreateValues("B", 1, "read"), Policy.CreateValues("B", 2, "read")));
     }
 
-    private static Func<TRequest, TPolicy, bool> Compile<TRequest, TPolicy>
-    (
-        string expressionText,
-        string requestType, in TRequest r,
-        string policyType, in TPolicy p)
-        where TRequest : struct, IRequestValues where TPolicy : IPolicyValues
-    {
-        Interpreter interpreter = new();
-        return interpreter.ParseAsDelegate<Func<TRequest, TPolicy, bool>>(
-            expressionText, requestType, policyType
-        );
-    }
+
+
 }
diff --git a/Casbin.UnitTests/ModelTests/EnforcerTest.cs b/Casbin.UnitTests/ModelTests/EnforcerTest.cs
index 64eb87b..5b00b17 100644
--- a/Casbin.UnitTests/ModelTests/EnforcerTest.cs
+++ b/Casbin.UnitTests/ModelTests/EnforcerTest.cs
@@ -69,7 +69,7 @@ public void TestEnforceWithoutAutoLoadPolicy()
         m.AddDef("e", "e", "some(where (p.eft == allow))");
         m.AddDef("m", "m", "r.sub == p.sub && keyMatch(r.obj, p.obj) && regexMatch(r.act, p.act)");
 
-        FileAdapter a = new("examples/keymatch_policy.csv");
+        FileAdapter a = new("Examples/keymatch_policy.csv");
         IEnforcer e = new Enforcer(m, a, new EnforcerOptions { AutoLoadPolicy = false });
         Assert.Empty(e.GetPolicy());
 
@@ -118,7 +118,7 @@ public void TestKeyMatchModelInMemory()
         m.AddDef("e", "e", "some(where (p.eft == allow))");
         m.AddDef("m", "m", "r.sub == p.sub && keyMatch(r.obj, p.obj) && regexMatch(r.act, p.act)");
 
-        FileAdapter a = new("examples/keymatch_policy.csv");
+        FileAdapter a = new("Examples/keymatch_policy.csv");
 
         Enforcer e = new(m, a);
 
@@ -179,7 +179,7 @@ public async Task TestKeyMatchModelInMemoryAsync()
         m.AddDef("e", "e", "some(where (p.eft == allow))");
         m.AddDef("m", "m", "r.sub == p.sub && keyMatch(r.obj, p.obj) && regexMatch(r.act, p.act)");
 
-        FileAdapter a = new("examples/keymatch_policy.csv");
+        FileAdapter a = new("Examples/keymatch_policy.csv");
 
         Enforcer e = new(m, a);
 
@@ -240,7 +240,7 @@ public void TestKeyMatchModelInMemoryDeny()
         m.AddDef("e", "e", "!some(where (p.eft == deny))");
         m.AddDef("m", "m", "r.sub == p.sub && keyMatch(r.obj, p.obj) && regexMatch(r.act, p.act)");
 
-        FileAdapter a = new("examples/keymatch_policy.csv");
+        FileAdapter a = new("Examples/keymatch_policy.csv");
 
         Enforcer e = new(m, a);
 
@@ -671,7 +671,7 @@ public void TestInitEmpty()
         m.AddDef("e", "e", "some(where (p.eft == allow))");
         m.AddDef("m", "m", "r.sub == p.sub && keyMatch(r.obj, p.obj) && regexMatch(r.act, p.act)");
 
-        FileAdapter a = new("examples/keymatch_policy.csv");
+        FileAdapter a = new("Examples/keymatch_policy.csv");
 
         e.SetModel(m);
         e.SetAdapter(a);
@@ -691,7 +691,7 @@ public async Task TestInitEmptyAsync()
         m.AddDef("e", "e", "some(where (p.eft == allow))");
         m.AddDef("m", "m", "r.sub == p.sub && keyMatch(r.obj, p.obj) && regexMatch(r.act, p.act)");
 
-        FileAdapter a = new("examples/keymatch_policy.csv");
+        FileAdapter a = new("Examples/keymatch_policy.csv");
 
         e.SetModel(m);
         e.SetAdapter(a);
@@ -711,7 +711,7 @@ public void TestInitEmptyByInputStream()
         m.AddDef("e", "e", "some(where (p.eft == allow))");
         m.AddDef("m", "m", "r.sub == p.sub && keyMatch(r.obj, p.obj) && regexMatch(r.act, p.act)");
 
-        using (FileStream fs = new("examples/keymatch_policy.csv", FileMode.Open, FileAccess.Read,
+        using (FileStream fs = new("Examples/keymatch_policy.csv", FileMode.Open, FileAccess.Read,
                    FileShare.ReadWrite))
         {
             FileAdapter a = new(fs);
@@ -734,7 +734,7 @@ public async Task TestInitEmptyByInputStreamAsync()
         m.AddDef("e", "e", "some(where (p.eft == allow))");
         m.AddDef("m", "m", "r.sub == p.sub && keyMatch(r.obj, p.obj) && regexMatch(r.act, p.act)");
 
-        using (FileStream fs = new("examples/keymatch_policy.csv", FileMode.Open, FileAccess.Read,
+        using (FileStream fs = new("Examples/keymatch_policy.csv", FileMode.Open, FileAccess.Read,
                    FileShare.ReadWrite))
         {
             FileAdapter a = new(fs);
@@ -753,7 +753,7 @@ public async Task TestInitEmptyByInputStreamAsync()
     [Fact]
     public void TestReloadPolicy()
     {
-        Enforcer e = new("examples/rbac_model.conf", "examples/rbac_policy.csv");
+        Enforcer e = new("Examples/rbac_model.conf", "Examples/rbac_policy.csv");
 
         e.LoadPolicy();
         TestGetPolicy(e,
@@ -764,7 +764,7 @@ public void TestReloadPolicy()
     [Fact]
     public async Task TestReloadPolicyAsync()
     {
-        Enforcer e = new("examples/rbac_model.conf", "examples/rbac_policy.csv");
+        Enforcer e = new("Examples/rbac_model.conf", "Examples/rbac_policy.csv");
 
         await e.LoadPolicyAsync();
         TestGetPolicy(e,
@@ -775,7 +775,7 @@ public async Task TestReloadPolicyAsync()
     [Fact]
     public void TestSavePolicy()
     {
-        Enforcer e = new("examples/rbac_model.conf", "examples/rbac_policy.csv");
+        Enforcer e = new("Examples/rbac_model.conf", "Examples/rbac_policy.csv");
 
         e.SavePolicy();
     }
@@ -783,7 +783,7 @@ public void TestSavePolicy()
     [Fact]
     public async Task TestSavePolicyAsync()
     {
-        Enforcer e = new("examples/rbac_model.conf", "examples/rbac_policy.csv");
+        Enforcer e = new("Examples/rbac_model.conf", "Examples/rbac_policy.csv");
 
         await e.SavePolicyAsync();
     }
@@ -791,7 +791,7 @@ public async Task TestSavePolicyAsync()
     [Fact]
     public void TestSavePolicyWithoutBasicModel()
     {
-        Enforcer e = new("examples/basic_model.conf", "examples/basic_policy.csv");
+        Enforcer e = new("Examples/basic_model.conf", "Examples/basic_policy.csv");
 
         e.SavePolicy();
     }
@@ -799,7 +799,7 @@ public void TestSavePolicyWithoutBasicModel()
     [Fact]
     public async Task TestSavePolicyWithoutBasicModelAsync()
     {
-        Enforcer e = new("examples/basic_model.conf", "examples/basic_policy.csv");
+        Enforcer e = new("Examples/basic_model.conf", "Examples/basic_policy.csv");
 
         await e.SavePolicyAsync();
     }
@@ -807,7 +807,7 @@ public async Task TestSavePolicyWithoutBasicModelAsync()
     [Fact]
     public void TestClearPolicy()
     {
-        Enforcer e = new("examples/rbac_model.conf", "examples/rbac_policy.csv");
+        Enforcer e = new("Examples/rbac_model.conf", "Examples/rbac_policy.csv");
 
         e.ClearPolicy();
     }
@@ -819,7 +819,7 @@ public void TestClearPolicy()
     [Fact]
     public void TestEnableEnforce()
     {
-        Enforcer e = new("examples/basic_model.conf", "examples/basic_policy.csv");
+        Enforcer e = new("Examples/basic_model.conf", "Examples/basic_policy.csv");
 
         e.EnableEnforce(false);
         TestEnforce(e, "alice", "data1", "read", true);
@@ -846,7 +846,7 @@ public void TestEnableEnforce()
     [Fact]
     public void TestEnableLog()
     {
-        Enforcer e = new("examples/basic_model.conf", "examples/basic_policy.csv")
+        Enforcer e = new("Examples/basic_model.conf", "Examples/basic_policy.csv")
         {
             Logger = new MockLogger<Enforcer>(_testOutputHelper)
         };
@@ -875,7 +875,7 @@ public void TestEnableLog()
     [Fact]
     public void TestEnableAutoSave()
     {
-        Enforcer e = new("examples/basic_model.conf", "examples/basic_policy.csv");
+        Enforcer e = new("Examples/basic_model.conf", "Examples/basic_policy.csv");
 
         e.EnableAutoSave(false);
         // Because AutoSave is disabled, the policy change only affects the policy in Casbin enforcer,
@@ -914,7 +914,7 @@ public void TestEnableAutoSave()
     [Fact]
     public async Task TestEnableAutoSaveAsync()
     {
-        Enforcer e = new("examples/basic_model.conf", "examples/basic_policy_for_async_adapter_test.csv");
+        Enforcer e = new("Examples/basic_model.conf", "Examples/basic_policy_for_async_adapter_test.csv");
 
         e.EnableAutoSave(false);
         // Because AutoSave is disabled, the policy change only affects the policy in Casbin enforcer,
@@ -953,8 +953,8 @@ public async Task TestEnableAutoSaveAsync()
     [Fact]
     public void TestInitWithAdapter()
     {
-        FileAdapter adapter = new("examples/basic_policy.csv");
-        Enforcer e = new("examples/basic_model.conf", adapter);
+        FileAdapter adapter = new("Examples/basic_policy.csv");
+        Enforcer e = new("Examples/basic_model.conf", adapter);
 
         TestEnforce(e, "alice", "data1", "read", true);
         TestEnforce(e, "alice", "data1", "write", false);
@@ -969,7 +969,7 @@ public void TestInitWithAdapter()
     [Fact]
     public void TestRoleLinks()
     {
-        Enforcer e = new("examples/rbac_model.conf");
+        Enforcer e = new("Examples/rbac_model.conf");
         e.EnableAutoBuildRoleLinks(false);
         e.BuildRoleLinks();
         e.Enforce("user501", "data9", "read");
@@ -978,8 +978,8 @@ public void TestRoleLinks()
     [Fact]
     public void TestGetAndSetModel()
     {
-        Enforcer e = new("examples/basic_model.conf", "examples/basic_policy.csv");
-        Enforcer e2 = new("examples/basic_with_root_model.conf", "examples/basic_policy.csv");
+        Enforcer e = new("Examples/basic_model.conf", "Examples/basic_policy.csv");
+        Enforcer e2 = new("Examples/basic_with_root_model.conf", "Examples/basic_policy.csv");
 
         TestEnforce(e, "root", "data1", "read", false);
 
@@ -991,8 +991,8 @@ public void TestGetAndSetModel()
     [Fact]
     public void TestGetAndSetAdapterInMem()
     {
-        Enforcer e = new("examples/basic_model.conf", "examples/basic_policy.csv");
-        Enforcer e2 = new("examples/basic_model.conf", "examples/basic_inverse_policy.csv");
+        Enforcer e = new("Examples/basic_model.conf", "Examples/basic_policy.csv");
+        Enforcer e2 = new("Examples/basic_model.conf", "Examples/basic_inverse_policy.csv");
 
         TestEnforce(e, "alice", "data1", "read", true);
         TestEnforce(e, "alice", "data1", "write", false);
@@ -1008,8 +1008,8 @@ public void TestGetAndSetAdapterInMem()
     [Fact]
     public async Task TestGetAndSetAdapterInMemAsync()
     {
-        Enforcer e = new("examples/basic_model.conf", "examples/basic_policy_for_async_adapter_test.csv");
-        Enforcer e2 = new("examples/basic_model.conf", "examples/basic_inverse_policy.csv");
+        Enforcer e = new("Examples/basic_model.conf", "Examples/basic_policy_for_async_adapter_test.csv");
+        Enforcer e2 = new("Examples/basic_model.conf", "Examples/basic_inverse_policy.csv");
 
         await TestEnforceAsync(e, "alice", "data1", "read", true);
         await TestEnforceAsync(e, "alice", "data1", "write", false);
@@ -1025,11 +1025,11 @@ public async Task TestGetAndSetAdapterInMemAsync()
     [Fact]
     public void TestSetAdapterFromFile()
     {
-        Enforcer e = new("examples/basic_model.conf");
+        Enforcer e = new("Examples/basic_model.conf");
 
         TestEnforce(e, "alice", "data1", "read", false);
 
-        FileAdapter a = new("examples/basic_policy.csv");
+        FileAdapter a = new("Examples/basic_policy.csv");
         e.SetAdapter(a);
         e.LoadPolicy();
         TestEnforce(e, "alice", "data1", "read", true);
@@ -1046,11 +1046,11 @@ public void TestSetAdapterFromFile()
     [Fact]
     public async Task TestSetAdapterFromFileAsync()
     {
-        Enforcer e = new("examples/basic_model.conf");
+        Enforcer e = new("Examples/basic_model.conf");
 
         await TestEnforceAsync(e, "alice", "data1", "read", false);
 
-        FileAdapter a = new("examples/basic_policy_for_async_adapter_test.csv");
+        FileAdapter a = new("Examples/basic_policy_for_async_adapter_test.csv");
         e.SetAdapter(a);
         await e.LoadPolicyAsync();
         await TestEnforceAsync(e, "alice", "data1", "read", true);
diff --git a/Casbin.UnitTests/ModelTests/RbacApiTest.cs b/Casbin.UnitTests/ModelTests/RbacApiTest.cs
index 036e224..32834db 100644
--- a/Casbin.UnitTests/ModelTests/RbacApiTest.cs
+++ b/Casbin.UnitTests/ModelTests/RbacApiTest.cs
@@ -423,8 +423,8 @@ public void TestGetImplicitPermissionsForUserWithDomain()
 
         TestGetImplicitPermissions(e, "alice", AsList(
                 AsList("alice", "domain1", "data2", "read"),
-                AsList("role:writer", "domain1", "data1", "write"),
-                AsList("role:reader", "domain1", "data1", "read")),
+                AsList("role:reader", "domain1", "data1", "read"),
+                AsList("role:writer", "domain1", "data1", "write")),
             "domain1");
     }
 
diff --git a/Casbin.UnitTests/RbacTests/GroupRoleManagerTest.cs b/Casbin.UnitTests/RbacTests/GroupRoleManagerTest.cs
index 57067be..f0d309d 100644
--- a/Casbin.UnitTests/RbacTests/GroupRoleManagerTest.cs
+++ b/Casbin.UnitTests/RbacTests/GroupRoleManagerTest.cs
@@ -9,7 +9,7 @@ public class GroupRoleManagerTest
     [Fact]
     public void TestGroupRoleManager()
     {
-        Enforcer e = new("examples/group_with_domain_model.conf", "examples/group_with_domain_policy.csv");
+        Enforcer e = new("Examples/group_with_domain_model.conf", "Examples/group_with_domain_policy.csv");
         GroupRoleManager roleManager = new(10);
         e.SetRoleManager("g", roleManager);
         e.SetRoleManager("g2", roleManager);
diff --git a/Casbin.UnitTests/Util/ExpressionUtil.cs b/Casbin.UnitTests/Util/ExpressionUtil.cs
new file mode 100644
index 0000000..090eb25
--- /dev/null
+++ b/Casbin.UnitTests/Util/ExpressionUtil.cs
@@ -0,0 +1,20 @@
+using System;
+using Casbin.Model;
+using DynamicExpresso;
+
+namespace Casbin.UnitTests.Util;
+
+public static class ExpressionUtil
+{
+    public static Func<TRequest, TPolicy, bool> Compile<TRequest, TPolicy>
+    (
+        Interpreter interpreter, string expressionText,
+        string requestType, in TRequest r,
+        string policyType, in TPolicy p)
+        where TRequest : struct, IRequestValues where TPolicy : IPolicyValues
+    {
+        return interpreter.ParseAsDelegate<Func<TRequest, TPolicy, bool>>(
+            expressionText, requestType, policyType
+        );
+    }
+}
diff --git a/Casbin/EnforceView.cs b/Casbin/EnforceView.cs
index 21c0b32..74a1cce 100644
--- a/Casbin/EnforceView.cs
+++ b/Casbin/EnforceView.cs
@@ -127,13 +127,11 @@ public static string TransformMatcher(in EnforceView view, string matcher)
                     Regex reg = new Regex(perfix + $@"{view.RequestType}\.{tokenPair.Key}" + suffix);
                     matcher = reg.Replace(matcher, $"{view.RequestType}[{tokenPair.Value}]");
                 }
-
                 foreach (KeyValuePair<string, int> tokenPair in view.PolicyAssertion.Tokens)
                 {
                     Regex reg = new Regex(perfix + $@"{view.PolicyType}\.{tokenPair.Key}" + suffix);
                     matcher = reg.Replace(matcher, $"{view.PolicyType}[{tokenPair.Value}]");
                 }
-
                 return matcher;
             }
 
@@ -142,13 +140,11 @@ public static string TransformMatcher(in EnforceView view, string matcher)
                 Regex reg = new Regex(perfix + $@"{view.RequestType}\.{tokenPair.Key}" + suffix);
                 matcher = reg.Replace(matcher, $"{view.RequestType}.Value{tokenPair.Value + 1}");
             }
-
             foreach (KeyValuePair<string, int> tokenPair in view.PolicyAssertion.Tokens)
             {
                 Regex reg = new Regex(perfix + $@"{view.PolicyType}\.{tokenPair.Key}" + suffix);
                 matcher = reg.Replace(matcher, $"{view.PolicyType}.Value{tokenPair.Value + 1}");
             }
-
             return matcher;
         }
     }
diff --git a/Casbin/Extensions/Enforcer/ManagementEnforcerExtension.cs b/Casbin/Extensions/Enforcer/ManagementEnforcerExtension.cs
index 502d819..43b373e 100644
--- a/Casbin/Extensions/Enforcer/ManagementEnforcerExtension.cs
+++ b/Casbin/Extensions/Enforcer/ManagementEnforcerExtension.cs
@@ -14,17 +14,14 @@ public static class ManagementEnforcerExtension
         /// <param name="enforcer"></param>
         /// <param name="name">The name of the new function.</param>
         /// <param name="function">The function.</param>
-        public static void AddFunction(this IEnforcer enforcer, string name, Delegate function) =>
+        public static void AddFunction<T>(this IEnforcer enforcer, string name, T function) where T : Delegate
+        {
             enforcer.Model.ExpressionHandler.SetFunction(name, function);
-
-        /// <summary>
-        ///     Adds a customized function.
-        /// </summary>
-        /// <param name="enforcer"></param>
-        /// <param name="name">The name of the new function.</param>
-        /// <param name="function">The function.</param>
-        public static void AddFunction(this IEnforcer enforcer, string name, Func<string, string, bool> function) =>
-            AddFunction(enforcer, name, (Delegate)function);
+            if (enforcer.AutoCleanEnforceCache)
+            {
+                enforcer.ClearCache();
+            }
+        }
 
         #region "p" (Store) Management
 
diff --git a/Casbin/Extensions/Enforcer/RbacEnforcerExtension.cs b/Casbin/Extensions/Enforcer/RbacEnforcerExtension.cs
index 9821121..b5ddfe2 100644
--- a/Casbin/Extensions/Enforcer/RbacEnforcerExtension.cs
+++ b/Casbin/Extensions/Enforcer/RbacEnforcerExtension.cs
@@ -523,19 +523,17 @@ public static IEnumerable<string> GetImplicitRolesForUser(this IEnforcer enforce
 
                     foreach (string role in roles)
                     {
-                        if (roleSet.Contains(role))
+                        if (roleSet.Add(role))
                         {
-                            continue;
+                            queue.Enqueue(role);
                         }
-
-                        roleSet.Add(role);
-                        queue.Enqueue(role);
                     }
                 }
             }
-
             roleSet.Remove(name);
-            return roleSet;
+            var roleList = roleSet.ToList();
+            roleList.Sort();
+            return roleList;
         }
 
         /// <summary>