Why wouldn't a folder exist after you create it?

Question

This doesn't seem to make sense, so I'm obviously doing something wrong:

DirectoryInfo folder = new DirectoryInfo(Environment.CurrentDirectory + @"\Test");

if (folder.Exists == false) {
    folder.Create();

    var doesItExists = folder.Exists;
}

Creates a folder if it doesn't exist. Except doesItExists is always false. Why would it be false if I just created it?

Answer 1

The value in folder.Exists is cached. I would suggest doing this check:

var doesItExists = Directory.Exists(folder.FullName);

Or you could call folder.Refresh() to update the cache before checking if the directory exists after creating it. See this previous answer.

Answer 2

Assuming that folder is a DirectoryInfo or FileSystemInfo, it reads its values once, and then returns cached values. It doesn't notice that you've created the directory. Call Refresh().

Alternatively use Directory.Exists().

Answer 3

this will get you true,you need to call refresh():

            DirectoryInfo folder = new DirectoryInfo(Environment.CurrentDirectory + @"\Test");

            if (folder.Exists == false)
            {
                folder.Create();
                folder.Refresh();

                var doesItExists = folder.Exists;
            }