Create Folder

System.IO.Directory.CreateDirectory(@"c:\NewFolder");
System.IO.Directory.CreateDirectory(@"c:\NewFolder\NewSubFolder");


// Specify a "currently active folder"
//Create a new subfolder under the current active folder
string activeDir = @"c:\testdir2";

string newPath = System.IO.Path.Combine(activeDir, "mySubDir");

// Create the subfolder
System.IO.Directory.CreateDirectory(newPath);