[en] Added a .NET book

free-programming-books.md

@@ -1123,6 +1123,7 @@ See also [TeX](#tex)
 
 
 ###.NET (C# / VB / Nemerle / Visual Studio)
+* [.NET for Visual FoxPro Developers](http://foxcentral.net/microsoft/NETforVFPDevelopers.htm)
 * [C# Essentials](http://www.techotopia.com/index.php/C_Sharp_Essentials)
 * [C# Programming - Wikibook](http://en.wikibooks.org/wiki/C_Sharp_Programming)
 * [C# Yellow Book](http://www.csharpcourse.com/) (intro to programming)