I am working on an ASP.NET 3.5 project which has 55 projects in a solution. When opening the solution in Visual Studio 2008, it takes over a minute to open - about 1 second for each project. However, if I disconnect the network cable before opening the solution, it only takes about 15 seconds! Any ideas about what could be causing the slowdown?
You might have extensions installed that slow Visual Studio down. For help on managing extensions to improve performance, see Change extension settings to improve performance. Similarly, you might have tool windows that slow Visual Studio down.
To avoid extending startup time, Visual Studio loads extensions using an on demand approach. This behavior means that extensions don't open immediately after Visual Studio starts, but on an as-needed basis.
I had this happen to me back in the days when we were using Visual Source Safe.
Could be your source control plugin asking for updates if you have the solution under source control.
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