Peek definition

You probably know F12 in Visual Studio, which transfers you to the point of a definition. But did you know that pressing Alt-F12 will invoke a function called peek definition, which only opens a small popup to inspect the code, but will not actually go there. Much faster to check out what a constant or enum value really is, or a zillion other cases where I usually just went back to the place where I transferred to the definition from.

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