Console.WriteLine(""); gets stuck

Question

Sometimes when I execute the above statement, the program freezes in a console application. If I break, I can't move to the next line. Do I need to reset a buffer or something?

It's a batch process application that displays messages to the screen. Has anyone experienced this and managed to resolve it. It seems to be a new thing. I'm using Visual Studio 2017 Prof. edition.

The function where WriteLine stalls is below. The value of sMessage is blank "".

static void Display(string sMessage, DisplayColours eColour = DisplayColours.White)
{
    if (eColour == DisplayColours.Yellow)
        Console.ForegroundColor = ConsoleColor.Yellow;
    if (eColour == DisplayColours.Blue)
        Console.ForegroundColor = ConsoleColor.Cyan;
    if (eColour == DisplayColours.Green)
        Console.ForegroundColor = ConsoleColor.Green;
    if (eColour == DisplayColours.Red)
        Console.ForegroundColor = ConsoleColor.Red;
    if (eColour == DisplayColours.Magenta)
        Console.ForegroundColor = ConsoleColor.Magenta;
    if (oFptr != null)
    {
        oFptr.WriteLine(sMessage);
        oFptr.Flush();
    }
    Console.WriteLine(sMessage);
    Console.ForegroundColor = ConsoleColor.White;
}

Answer 1

One thing that can cause this, is if you click on the console window in such a way that it starts to select text, in other words, the first step in copying text out of the console window. When this happens, a write to the console window will hang until you return to the console window and press Enter to remove the selection box.