C# WPF Clipboard.SetText() not working properly

Clearing the Clipboard is redundant as SetText does that automatically for you.

This is what I usually use:

Clipboard.SetText(msg, TextDataFormat.Text);

or

Clipboard.SetText(msg,TextDataFormat.UnicodeText);

Reference is here

    protected void clipboardSetText(string inTextToCopy)
    {
        var clipboardThread = new Thread(() => clipBoardThreadWorker(inTextToCopy));
        clipboardThread.SetApartmentState(ApartmentState.STA);
        clipboardThread.IsBackground = false;
        clipboardThread.Start();
    }
    private void clipBoardThreadWorker(string inTextToCopy)
    {
        System.Windows.Clipboard.SetText(inTextToCopy);
    }