How to move files from locked folder to another folder in c#.net?

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C#

C#4.0

hello friends,

I have one locked folder in C:\b. There are many files in that folder. So now,I want to move all the files from locked folder to other folder.

My lock folder code is here:

private void Permissionbtn_Click_1(object sender, EventArgs e)
{ 
            DirectoryInfo myDirectoryInfo = new DirectoryInfo(textBox1.Text);        
          
            DirectorySecurity myDirectorySecurity = myDirectoryInfo.GetAccessControl();

            string User = System.Environment.UserDomainName + "\\" +     comboBox1.SelectedItem.ToString();
           
            myDirectorySecurity.AddAccessRule(new FileSystemAccessRule(User,
                                          FileSystemRights.Read, InheritanceFlags.ObjectInherit,PropagationFlags.None,AccessControlType.Deny));     
         
            myDirectoryInfo.SetAccessControl(myDirectorySecurity);        
            MessageBox.Show("Permissions Altered Successfully");     
}

Here is my move_files code:

string sourcePath = @"C:\b\";
string destinationPath = @"\\server\t\";

string[] files = System.IO.Directory.GetFiles(sourcePath);
foreach (string s in files)
{
    var fileName = Path.GetFileName(s);
    sourceFile = System.IO.Path.Combine(sourcePath, fileName);
    destFile = System.IO.Path.Combine(destinationPath, fileName);
    File.Move(sourceFile, destFile);                        
}

When I going to run move_files code it will throws the "Access to the path 'C:\b\' is denied.". How to do this? please help me out.