diff --git a/CSUtilities/CSUtilities.projitems b/CSUtilities/CSUtilities.projitems
index a52fead..e6a317a 100644
--- a/CSUtilities/CSUtilities.projitems
+++ b/CSUtilities/CSUtilities.projitems
@@ -14,6 +14,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)EnvironmentVars.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Extensions\IDictionaryExtension.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Extensions\ObjectExtensions.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Extensions\StreamExtensions.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Extensions\StringBuilderExtensions.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Text\CodePage.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Converters\DefaultEndianConverter.cs" />
diff --git a/CSUtilities/Extensions/StreamExtensions.cs b/CSUtilities/Extensions/StreamExtensions.cs
new file mode 100644
index 0000000..b77dcfb
--- /dev/null
+++ b/CSUtilities/Extensions/StreamExtensions.cs
@@ -0,0 +1,29 @@
+using System.IO;
+
+namespace CSUtilities.Extensions
+{
+	/// <summary>
+	/// Stream utility extensions.
+	/// </summary>
+#if PUBLIC
+	public
+#else
+	internal
+#endif
+	static class StreamExtensions
+	{
+#if NETFRAMEWORK
+		/// <summary>
+		/// When overridden in a derived class, writes a sequence of bytes to the current
+		/// stream and advances the current position within this stream by the number of
+		/// bytes written.
+		/// </summary>
+		/// <param name="stream"></param>
+		/// <param name="buffer">A region of memory. This method copies the contents of this region to the current stream. </param>
+		public static void Write(this Stream stream, byte[] buffer)
+		{
+			stream.Write(buffer, 0, buffer.Length);
+		}
+#endif
+	}
+}
diff --git a/CSUtilities/Extensions/StringBuilderExtensions.cs b/CSUtilities/Extensions/StringBuilderExtensions.cs
index 3529d78..9209a27 100644
--- a/CSUtilities/Extensions/StringBuilderExtensions.cs
+++ b/CSUtilities/Extensions/StringBuilderExtensions.cs
@@ -16,7 +16,7 @@ static class StringBuilderExtensions
 	{
 #if NETFRAMEWORK
 		/// <summary>
-		/// 
+		/// Concatenates and appends the members of a collection, using the specified separator between each member.
 		/// </summary>
 		public static StringBuilder AppendJoin<T>(this StringBuilder sb, string? separator, IEnumerable<T> values)
 		{