Convert to block scoped namespace (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/ide0160)

Convert to block scoped namespace (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/ide0160)

Convert to block scoped namespace (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/ide0160)

Use block body for method (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/ide0022)

Exception type System.NullReferenceException is reserved by the runtime (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2201)

Accessibility modifiers required (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/ide0040)

Accessibility modifiers required (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/ide0040)

Use block body for method (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/ide0022)

get_ItemsSource creates an exception of type NullReferenceException, an exception type that should not be raised in a property. If this exception instance might be raised, use a different exception type, convert this property into a method, or change this property's logic so that it no longer raises an exception. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1065)