Access to the path 'xyz' is denied.

[jimatqsi]

I am writing my very first .net program. I'm writing a simple Windows form program that should merge the contents of all the files in a folder into one single file in a different folder.

Every time, no matter what path I use, I am getting
Access to the path 'blahblah' is denied. I have moved the data into my user folder in order to be sure to actually have access. I have run Visual Studio as Administrator, and I have put this in appmanifest

  <requestedExecutionLevel level="requireAdministrator" uiAccess="false" />

Here is my code:

Imports System
Imports System.IO
 
Public Class Form1
 
 
 
    Private Sub Merge_cmd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Merge_cmd.Click
        Dim Directory As New IO.DirectoryInfo(Me.FolderPath_txt.Text)
        Dim allFiles As IO.FileInfo() = Directory.GetFiles("*.*")
        Dim singleFile As IO.FileInfo
 
        Try
            For Each singleFile In allFiles
                File.AppendAllText(Me.TargetFile_txt.Text, File.ReadAllText(Me.FolderPath_txt.Text))
            Next
        Catch ex As Exception
            Debug.WriteLine("Exception Information: " & vbCrLf & ex.Message)
        Finally
            'Resume Next
        End Try
 
    End Sub
End Class

The input folder (Me.FolderPath_txt.Text) is
c:\users\Jim\Final
The output file (Me.TargetFile_txt.Text) is
c:\users\jim\dictionary.txt

Here is the result from the debug window
A first chance exception of type 'System.UnauthorizedAccessException' occurred in mscorlib.dll
Exception Information:
Access to the path 'c:\users\Jim\Final' is denied.

Help, please.

Thanks,
jim