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I'm trying to open up two .SLN (solution) files in Visual Studio, but whenever I drag one in, the other goes away... Help?

Alexei Levenkov
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TheMooseLord
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    You can only open 1 solution file at a time - if your goal is to open projects from multiple solutions you can either add them to one of your solutions or create a new solution to add the existing projects to. – Filburt Dec 08 '20 at 22:59
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    Or, launch two instances of VS – devlin carnate Dec 08 '20 at 23:01

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The .sln files are solution files which Visual Studio can only open one of per instance; however, you may open multiple projects (.csproj, .vbproj, etc.) in a single solution if that's what you're wanting to do.

Jay Wilson
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