Getting an error when the Word add-in is run

[tejas1sastry]

I want to copy the word entered by a user as soon as the user presses space(Just like the spell checker in word editors do). I'm using the following code:

private void ThisAddIn_Startup(object sender, System.EventArgs e)
    {
        ConsoleKeyInfo info = Console.ReadKey();
        if (info.KeyChar == ' ')
        {
            Word.Range rng = this.Application.ActiveDocument.Words.Last;
            rng.Select();
            rng.Copy();
            String input = Clipboard.GetText(TextDataFormat.Text);
        }
    }

I'm getting the following error:

An exception of type 'System.Invalid OperationExcept ion' occurred in mscorlib.dll but was not handled in user code.

For the following line:

ConsoleKeyInfo info = Console.ReadKey();

[Frinavale]

What type of application are you implementing?