Directory.Move isn't trying the correct folder

I have made some code intended to sort all my movies on my PC into subfolders for each letter of the alphabet (e.g. "An Example" would go in a subfolder containing only movies which start with the letter "A".

The code I've written looks to me like it should work without problems, although for some reason this code:

'Declarations
System.IO.Directory.CreateDirectory("D:\Vuze Downloads\Movies\.CAMS")
System.IO.Directory.CreateDirectory("D:\Vuze Downloads\Movies\.TS")
Dim TS As String = "D:\Vuze Downloads\Movies\.TS\"
Dim CAM As String = "D:\Vuze Downloads\Movies\.CAMS\"
Dim mainFolder As New System.IO.DirectoryInfo("D:\Vuze Downloads\Movies\")

For Each f As System.IO.DirectoryInfo In mainFolder.GetDirectories()
    If Not UCase(f.ToString).Contains("(CAM)") And UCase(f.ToString).Contains("(TS)") Then
        System.IO.Directory.Move(f.ToString, mainFolder.Name & UCase(Left(f.Name, 1)) & "\" & f.Name)
    ElseIf UCase(f.Name.ToString).Contains("(CAM)") And Not UCase(f.Name.ToString).Contains("(TS)") Then
        System.IO.Directory.Move(f.ToString, CAM.ToString & UCase(Mid(f.Name, 5)) & "\" & f.Name.Substring(5))
    ElseIf UCase(f.Name.ToString).Contains("(TS)") And Not UCase(f.Name.ToString).Contains("(CAM)") Then
        System.IO.Directory.Move(f.ToString, TS.ToString & UCase(Mid(f.Name, 6)) & "\" & f.Name.Substring(6))
    End If
Next

Keeps throwing a exception at this line:

System.IO.Directory.Move(f.ToString, CAM.ToString & UCase(Mid(f.Name, 5)) & "\" & f.Name.Substring(5))

This is the exception:

An unhandled exception of type 'System.IO.DirectoryNotFoundException' occurred in
 mscorlib.dll

Additional information: Could not find a part of the path 
'D:\Users\Yorrick\documents\visual studio 2012\Projects\filmsort\filmsort\bin\Debug\(CAM)The Internship'.

As indicated by the declarations above, I have no idea how or why this code is trying to access that folder.

If anyone could take a look and hopefully spot the mistake I've made, that would be very much be appreciated.

Edit:

Having fixed the above problem, I encountered a new one. Using the code below, I now get the same exception, except this time additional information says "Could not find a part of the path." All my variables seem to be correct while debugging, so I seriously can't see why this isn't working.

Note: The commented line is something I tried, which gives me the System.IO.IOException: Cannot create a file when that file already exists.

Code:

System.IO.Directory.CreateDirectory("D:\Vuze Downloads\Movies\.CAMS")
System.IO.Directory.CreateDirectory("D:\Vuze Downloads\Movies\.TS")
Dim TS As String = "D:\Vuze Downloads\Movies\.TS\"
Dim CAM As String = "D:\Vuze Downloads\Movies\.CAMS\"
Dim mainFolder As New System.IO.DirectoryInfo("D:\Vuze Downloads\Movies\")

For Each f As System.IO.DirectoryInfo In mainFolder.GetDirectories()
    If Not UCase(f.ToString).Contains("(CAM)") And UCase(f.ToString).Contains("(TS)") Then
        System.IO.Directory.Move(f.FullName, mainFolder.FullName & UCase(Left(f.Name, 1)) & "\" & f.Name)
    ElseIf UCase(f.Name.ToString).Contains("(CAM)") And Not UCase(f.Name.ToString).Contains("(TS)") Then
        'System.IO.Directory.CreateDirectory(CAM & UCase(Mid(f.Name, 6)) & "\" & f.Name.Substring(6))
        System.IO.Directory.Move(f.FullName, CAM & UCase(Mid(f.Name, 6)) & "\" & f.Name.Substring(6))
    ElseIf UCase(f.Name.ToString).Contains("(TS)") And Not UCase(f.Name.ToString).Contains("(CAM)") Then
        System.IO.Directory.Move(f.FullName, TS.ToString & UCase(Mid(f.Name, 5)) & "\" & f.Name.Substring(5))
    End If
Next

Solution

This happens when you don't specify a full path name, like "c:\foo\bar", but a relative path name, like "bar". Relative path names are turned into full ones by prepending Environment.CurrentDirectory. Which by default is the build directory of your project.

This happened because you used DirectoryInfo.Name. Which is "bar" for a directory whose path is c:\foo\bar. You must use the FullName property instead.