Suddenly I discovered that my VS2008 stop viewing dataset in GUI designer mode, (just xml script). I do uninstall & install the VS, but no change, and no error message..! Any idea to fix this issue ?
no problem!, I will answer my question by my self! after 'googling' i found the answer here:
In Visual Studio Tools-> Visual Studio 2008 Command Prompt, enter devenv /setup. thanks.