C#/.NET: Check if Folder exists

If we need a folder in our application and we do not know whether this directory is already existing, we can just ask the system and check for the existence of this folder.

string folder = @"C:\TestFolder";

if (!Directory.Exists(folder) {
   // create the folder
} else {
   // folder exists
}

We can do that with special folders and each other type of directory. You can also do that with multiple folders when creating a folder list and going through it with the help of foreach.

More about that in another tutorial.