String is a valid directory

[Al Reid]

What's the most efficient way to determine if an arbitrary string is a path to a valid, existing directory?

Also, how can I convert the string to the same case as the original directory, assuming that the existing directory is mixed case
and the string is lower case?

TIA,

 

[Herfried K. Wagner [MVP]]

What's the most efficient way to determine if an arbitrary string is a
path to a valid, existing directory?

'System.IO.Directory.Exists', 'System.IO.DirectoryInfo.Exists'.

 

[Al Reid]

'System.IO.Directory.Exists', 'System.IO.DirectoryInfo.Exists'.

I guess I could do a quick timing test, but do you think that they are faster than the old

(GetAttr(strFilePath) And FileAttribute.Directory) = FileAttribute.Directory

I have potentially thousands of files and directories to handle in a short time frame and I want to use the fastest method.