Add Using extension for small using statements.

src/Z.Core/System.Using/TResult.Using.cs

@@ -0,0 +1,26 @@
+// Description: C# Extension Methods Library to enhances the .NET Framework by adding hundreds of new methods. It drastically increases developers productivity and code readability. Support C# and VB.NET
+// Website & Documentation: https://github.com/zzzprojects/Z.ExtensionMethods
+// Forum: https://github.com/zzzprojects/Z.ExtensionMethods/issues
+// License: https://github.com/zzzprojects/Z.ExtensionMethods/blob/master/LICENSE
+// More projects: http://www.zzzprojects.com/
+// Copyright � ZZZ Projects Inc. 2014 - 2016. All rights reserved.
+using System;
+using System.Text;
+
+public static partial class Extensions
+{
+    /// <summary>
+    ///     Using statement extension to skip small using blocks.
+    /// </summary>
+    /// <param name="factory">The factory function to create disposable object to act on.</param>
+    /// <param name="action">The function to use disposable object and return result</param>
+    /// <returns>TResult from specified action function</returns>
+    public static TResult Using<TDisposable, TResult>(Func<TDisposable> factory, Func<TDisposable, TResult> action)
+        where TDisposable : IDisposable
+    {
+        using (var disposable = factory()) 
+        {
+            return action(disposable);
+        }
+    }
+}