Question

I have some threading checks and I can get the below working by calling BeginInvoke(new Action<string,string>........ but I was wondering if you can use pre-defined Actions somehow?

private Action<string, string> DoSomething();

private void MakeItHappen(string InputA, string InputB)
{
  if (this.InvokeRequired)
  {
    this.BeginInvoke(DoSomething(InputA, InputB));
  }
  else
  {
     Label.Text = "Done";
     MyOtherGUIItem.Visible = false;
  }

}

Answer 1

You have to pass a plain delegate to BeginInvoke. You can use variable capture to wrap up your parameters like this:

private void MakeItHappen(string InputA, string InputB)
{
    if (this.InvokeRequired)
    {
        this.BeginInvoke((Action)delegate () { 
            MakeItHappen(InputA, InputB); 
        });
    }
    else
    {
        // do stuff with InputA and InputB
    }
}