diff --git a/Core/Extensions/InteropExtensions.cs b/Core/Extensions/InteropExtensions.cs
index 65e4e32a..399ab839 100644
--- a/Core/Extensions/InteropExtensions.cs
+++ b/Core/Extensions/InteropExtensions.cs
@@ -659,7 +659,7 @@ namespace Vanara.Extensions
 		/// <param name="allocatedBytes">If known, the total number of bytes allocated to the native memory in <paramref name="ptr"/>.</param>
 		/// <returns>The number of bytes written. The offset is not included.</returns>
 		/// <exception cref="InsufficientMemoryException"></exception>
-		public static int Write<T>(this IntPtr ptr, T value, int offset = 0, SizeT allocatedBytes = default) where T : struct =>
+		public static int Write<T>(this IntPtr ptr, in T value, int offset = 0, SizeT allocatedBytes = default) where T : struct =>
 			WriteNoChecks(ptr, value, offset, allocatedBytes);
 
 		internal static Type TrueType(Type type, out int size)
diff --git a/Core/InteropServices/SafeMemoryHandle.cs b/Core/InteropServices/SafeMemoryHandle.cs
index 33763614..79e035f8 100644
--- a/Core/InteropServices/SafeMemoryHandle.cs
+++ b/Core/InteropServices/SafeMemoryHandle.cs
@@ -426,7 +426,7 @@ namespace Vanara.InteropServices
 		/// <param name="value">The value to write.</param>
 		/// <param name="autoExtend">if set to <c>true</c> automatically extend the allocated memory to the size required to hold <paramref name="value"/>.</param>
 		/// <param name="offset">The number of bytes to offset from the beginning of this allocated memory before writing.</param>
-		public void Write<T>(T value, bool autoExtend = true, int offset = 0) where T : struct
+		public void Write<T>(in T value, bool autoExtend = true, int offset = 0) where T : struct
 		{
 			if (IsInvalid) throw new MemberAccessException("Safe memory pointer is not valid.");
 			if (autoExtend)