C# Word.Interop Change text of ContentControl DropDownList

Question

I want to change of a ContentControl using Word.Interop. It works with a ContentControl of Type Text. But it fails with a ContentControl of type wdContentControlDropdownList. Error message something like "You are not allowed to change because the field is protected".

Is there any way to change the active item of a DropDownList?

private void setstatus(string status)
{
    ContentControls ccList;
    ccList = this.activeDocument.SelectContentControlsByTitle("Status");
    ContentControl cc = ccList[1];
    // works with wdContentControlText
    // fails with wdContentControlDropdownList
    cc.Range.Text = status;
}

Answer 1

There is a strange workaround - but it works. Assign type RichText to the content control, then change the text. Afterwards reassgin the old type. The content control in Word remains unaffected.

private void setstatus(string status)
{
    ContentControls ccList;
    ccList = this.activeDocument.SelectContentControlsByTitle("Status");
    ContentControl cc = ccList[1];
    cc.Type = WdContentControlType.wdContentControlRichText;
    cc.Range.Text = status;
    cc.Type = WdContentControlType.wdContentControlDropdownList;
}