StringBuilderExtensions

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\StringBuilderExtensions.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Text\CodePage.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Converters\DefaultEndianConverter.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Converters\EndianConverter.cs" />

CSUtilities/Extensions/IDictionaryExtension.cs

@@ -3,7 +3,7 @@
 namespace CSUtilities.Extensions
 {
 	/// <summary>
-	/// Estensions for <see cref="IDictionary{TKey, TValue}"/>
+	/// Extensions for <see cref="IDictionary{TKey, TValue}"/>
 	/// </summary>
 	public static class IDictionaryExtension
 	{

CSUtilities/Extensions/StringBuilderExtensions.cs

@@ -0,0 +1,39 @@
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace CSUtilities.Extensions
+{
+	/// <summary>
+	/// StringBuilder utility extensions.
+	/// </summary>
+#if PUBLIC
+	public
+#else
+	internal
+#endif
+	static class StringBuilderExtensions
+	{
+#if NETFRAMEWORK
+		/// <summary>
+		/// 
+		/// </summary>
+		public static StringBuilder AppendJoin<T>(this StringBuilder sb, string? separator, IEnumerable<T> values)
+		{
+			separator ??= string.Empty;
+
+			for (var i = 0; i < values.Count(); i++)
+			{
+				if (i > 0)
+				{
+					sb.Append(separator);
+				}
+
+				sb.Append(values.ElementAt(i));
+			}
+
+			return sb;
+		}
+#endif
+	}
+}