Is there any way to create a blank solution (.sln) file first and then add projects?

Yes, How to: Create Solutions and Projects gives an overview. From the article: Creating Solutions To create a new solution On the File menu, select New and then click Project. In the Project types pane, select Other Project Types and then select Visual Studio Solutions. In the Templates pane, select Blank Solution. Enter a name … Read more

How can I rename a project folder from within Visual Studio?

TFS users: If you are using source control that requires you to warn it before your rename files/folders then look at this answer instead which covers the extra steps required. To rename a project’s folder, file (.*proj) and display name in Visual Studio: Close the solution. Rename the folder(s) outside Visual Studio. (Rename in TFS … Read more

What are the various “Build action” settings in Visual Studio project properties and what do they do?

None: The file is not included in the project output group and is not compiled in the build process. An example is a text file that contains documentation, such as a Readme file. Compile: The file is compiled into the build output. This setting is used for code files. Content: Allows you to retrieve a … Read more

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