C#

private const int RESOURCETYPE_DISK = 0x1;

[DllImport("mpr.dll")]
private static extern int WNetAddConnection2A(ref structNetResource pstNetRes, string psPassword, string psUsername, int piFlags);

[StructLayout(LayoutKind.Sequential)]
private struct structNetResource
{
    public int Scope;
    public int Type;
    public int DisplayType;
    public int Usage;
    public string LocalName;
    public string RemoteName;
    public string Comment;
    public string Provider;
}

/// <summary>
/// Transfers the specified file to the pre-defined Destination folder.
/// </summary>
/// <param name="AbsoluteFilename">The full path of the file to transfer.</param>
/// <param name="FileName">The name of the file, without the path.</param>
private void fileTransfer(string AbsoluteFilename, string FileName)
{
    try
    {
        //Define the directory mapping
        structNetResource stNetRes = new structNetResource();
        stNetRes.Scope = 2;
        stNetRes.Type = RESOURCETYPE_DISK;
        stNetRes.DisplayType = 3;
        stNetRes.Usage = 1;
        stNetRes.RemoteName = destinationFolder;  //Path to destination folder
        stNetRes.LocalName = string.Empty;  //This is the drive letter and colon (e.g., Q: )

        //Open the destination connection
        int i = WNetAddConnection2A(ref stNetRes, destinationPass, destinationUser, 0);
        if (i > 0) { throw new System.ComponentModel.Win32Exception(i); }

        //Move the file
        //  *** This is the line you would want to change ***
        if (File.Exists(AbsoluteFilename)) File.Move(AbsoluteFilename, destinationFolder + "\\" + FileName);
    }
    catch (Exception ex)
    {
        throw new System.Exception(ex.Message);
    }
}