try it
1) Open the path to the project in Windows Explorer
2) Find the .csproj.user file (or .vbproj.user)
3) Open it in a text editor (for example, in notepad)
4) Change the property of SharePointSiteUrl
5) Save the file, and then open the project again (by deploying)
This works great for me ..
Thanks Jinchun Chen
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