Solution 1: Use IE (Internet Explorer)
1-Right click on the Web Application project that comes with Silverlight project
2-From the context menu, chose "Properties". This will open the properties window in the screen.
3-Select web from left menu and scroll down to the end and select checkbox of silverlight.
Attach the process of silverlight to Internet explorer.
1-Clean VS Project.
3-Remove all bin and debug folder from project
4-Remove .XAP file from ClientBin folder
5-Start IDE and press F5 to start debugging.
Try to reset the Visual Studio settings by calling the "devenv /resetsettings" command. This is not recomended untill you have failed all solutions.
Remove Solution User Options (.suo) file present in your solution directory.
I guess you …