I got a new Windows Mobile. I was looking for a development tool. I have tried SharpDevelop. It got a solution template for Compact Framework. But the error,Microsoft.CompactFramework.Common.targets missing, appeared. I have spent a lot of time to solve this problem. Yeah! this morning, I reinstall .Net framework 2.0 SDK. The error has disappeared. But .NET 3.5 is not supported, because .NET SDK 3.5 for Windows Mobile is not downloadable.