From the docs:
https://msdn.microsoft.com/en-us/library/54a0at6s(v=vs.110).aspx
The remarks say:
"Any and all directories specified in path are created, unless they already exist or unless some part of path is invalid. If the directory already exists, this method does not create a new directory, but it returns a DirectoryInfo object for the existing directory."
From the docs:
https://msdn.microsoft.com/en-us/library/54a0at6s(v=vs.110).aspx
The remarks say:
"Any and all directories specified in path are created, unless they already exist or unless some part of path is invalid. If the directory already exists, this method does not create a new directory, but it returns a DirectoryInfo object for the existing directory."