Unreachable code detected in case statement

Question

I have a code:

    protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
    {
        switch (keyData)
        {
            case Keys.Alt|Ke         


        

Answer 1

A switch statement is not necessary here at all, avoiding the problem altogether:

protected override bool ProcessCmdKey(ref Message msg, Keys keyData) 
{ 
    return
        (keyData == Keys.Alt|Keys.D1 && this._condition1) ||
        (keyData == Keys.Control|Keys.U && this._condition2) ||
        base.ProcessCmdKey(ref msg, keyData); 
}