Visual Studio by default doesn't show the Solution under Solution Explorer if there is only one project.

For example, I've created a Visual C# Windows Application called "WindowsApplication123" in a solution called "Solution123", and left the default option to "Create directory for solution".

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In the Solution Explorer only the project is visible:

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I don't like this default because I cannot right-click the solution and quickly add a new project. I've to go to File, New, Project and then select to create the new project inside the existing solution (and it's not the default option in this case):

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The second problem is related to the "Add Project to Source Control" menu item:

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That, in reality is a "Add Solution to Source Control":

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Because it not only adds the project, but also the solution:

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To avoid these problems (and perhaps also others that I don't remember now...) the first thing that I do when I install Visual Studio is to select "Always show solution" under Tools, Options, Projects and Solutions:

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With this option, the solution is shown also when there is only one project:

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