// http://pinvoke.net/default.aspx/kernel32/FlushConsoleInputBuffer.html

    static extern bool FlushConsoleInputBuffer(

static extern bool FlushConsoleInputBuffer(IntPtr hConsoleInput);

This code segment will allow you to grab the Console input buffer using CreateFileW and Flush the input using FlushConsoleInputBuffer

  private static extern bool FlushConsoleInputBuffer(IntPtr hConsoleInput);

    FlushConsoleInputBuffer(inBuffer);