当 .sln 文件中包含以下内容时，会发生这种情况:

This happens when the following is in the .sln file:

GlobalSection(ExtensibilityGlobals) = postSolution
    MyGlobalProperty = AnyValue
EndGlobalSection

我发现企业库添加了其中之一.我删除了它，签入解决方案，关闭然后重新打开它，不再自动签出.

I found that Enterprise Library added one of these. I removed it, checked in the solution, closed then re-opened it, and no more automatic check out.