diff --git a/sources/OpenMcdf/CompoundFile.cs b/sources/OpenMcdf/CompoundFile.cs
index 5773576..3f5c6bf 100644
--- a/sources/OpenMcdf/CompoundFile.cs
+++ b/sources/OpenMcdf/CompoundFile.cs
@@ -1418,7 +1418,6 @@ List<Sector> result
                         break;
 
                     Sector ms = new Sector(Sector.MINISECTOR_SIZE, sourceStream);
-                    byte[] temp = new byte[Sector.MINISECTOR_SIZE];
 
                     ms.Id = nextSecID;
                     ms.Type = SectorType.Mini;
@@ -2630,7 +2629,7 @@ private static void DoCompression(CFStorage currSrcStorage, CFStorage currDstSto
                     {
                         CFStorage itemAsStorage = item as CFStorage;
                         CFStorage strg = currDstStorage.AddStorage(itemAsStorage.Name);
-                        strg.CLSID = new Guid(itemAsStorage.CLSID.ToByteArray());
+                        strg.CLSID = itemAsStorage.CLSID;
                         DoCompression(itemAsStorage, strg); // recursion, one level deeper
                     }
                 };
diff --git a/sources/OpenMcdf/DirectoryEntry.cs b/sources/OpenMcdf/DirectoryEntry.cs
index 947c23c..01ba62e 100644
--- a/sources/OpenMcdf/DirectoryEntry.cs
+++ b/sources/OpenMcdf/DirectoryEntry.cs
@@ -437,20 +437,14 @@ public override string ToString()
         public void AssignValueTo(RedBlackTree.IRBNode other)
         {
             DirectoryEntry d = other as DirectoryEntry;
-
             d.SetEntryName(GetEntryName());
-
-            d.CreationDate = new byte[CreationDate.Length];
             CreationDate.CopyTo(d.CreationDate, 0);
-
-            d.ModifyDate = new byte[ModifyDate.Length];
             ModifyDate.CopyTo(d.ModifyDate, 0);
-
             d.Size = Size;
             d.StartSect = StartSect;
             d.StateBits = StateBits;
             d.StgType = StgType;
-            d.storageCLSID = new Guid(storageCLSID.ToByteArray());
+            d.storageCLSID = storageCLSID;
             d.Child = Child;
         }
 
diff --git a/sources/OpenMcdf/Sector.cs b/sources/OpenMcdf/Sector.cs
index b789809..a904d7b 100644
--- a/sources/OpenMcdf/Sector.cs
+++ b/sources/OpenMcdf/Sector.cs
@@ -98,14 +98,16 @@ public byte[] GetData()
 
         public void ZeroData()
         {
-            data = new byte[Size];
+            if (data is null)
+                data = new byte[Size];
+            else
+                Array.Clear(data, 0, data.Length);
             DirtyFlag = true;
         }
 
         public void InitFATData()
         {
-            data = new byte[Size];
-
+            data ??= new byte[Size];
             for (int i = 0; i < Size; i++)
                 data[i] = 0xFF;