Why can't I interact with a console window after parenting it into my WPF application?

There is a control written by Dave Kerr which Solves Your problem.

Use this link: https://www.codeproject.com/articles/335909/embedding-a-console-in-a-c-application

this should be added that it uses a class named ProcessInterface which is included in the link.

and at last this part of code is the solution:

/// <summary>        /// Handles the KeyDown event of the richTextBoxConsole control.        /// </summary>        /// <param name="sender">The source of the event.</param>        /// <param name="e">The <see cref="System.Windows.Forms.KeyEventArgs"/> instance containing the event data.</param>        void richTextBoxConsole_KeyDown(object sender, KeyEventArgs e)        {            bool inReadOnlyZone = richTextBoxConsole.Selection.Start.CompareTo(inputStart) < 0;            //  If we're at the input point and it's backspace, bail.            if (inReadOnlyZone && e.Key == Key.Back)                e.Handled = true;;            //  Are we in the read-only zone?            if (inReadOnlyZone)            {                //  Allow arrows and Ctrl-C.                if (!(e.Key == Key.Left ||                    e.Key == Key.Right ||                    e.Key == Key.Up ||                    e.Key == Key.Down ||                    (e.Key == Key.C && Keyboard.Modifiers.HasFlag(ModifierKeys.Control))))                {                    e.Handled = true;                }            }            //  Is it the return key?            if (e.Key == Key.Return)            {                //  Get the input.                //todostring input = richTextBoxConsole.Text.Substring(inputStart, (richTextBoxConsole.SelectionStart) - inputStart);                //  Write the input (without echoing).                //todoWriteInput(input, Colors.White, false);            }        }