This document lists several C# integrated development environments (IDEs) including SharpDevelop, C# Studio, MonoDevelop, and XACC.IDE. It also provides 5 websites for C# resources: csharpfriends.com, csharp-source.net, thai-cs.spaces.live.com, msdn.microsoft.com/en-us/vcsharp/default.aspx, and twoguru.com/playground/cs_tutorial/index.htm. The websites are listed twice.