Error on all Input strings $("$int y $=$ Convert.ToInt$32($txtY$.$Text$)$;$")$

Code: C##

namespace Assignment$\_3$

$\{$

public partial class Maze : Form

$\{$

$/*$

$*$ Northeast

$*[0,1][0,1]$

$*[-1,0][0,0][1,0/]$ Southwest$[-1,0][1,0]$Northwest

$*[0,-1][0,-1]$

$*$ Southeast

$*/$

public Maze$()$

$\{$

InitializeComponent$()$;

$\}$

private void Maze$\_$Load$($object sender$,$ EventArgs e$)$

$\{$

txtOutput.Text $=$ "You are in a room with an exit to the North, Northeast, Northwest, South, Southeast, Southwest, East, and West.";

txtX$.$Text $="0"$;

txtX$.$Text $="0"$;

$\}$

private void btnNorth$\_$Click$($object sender$,$ EventArgs e$)$

$\{$

int x $=$ Convert.ToInt$32($txtX$.$Text$)$;

int y $=$ Convert.ToInt$32($txtY$.$Text$)$;

if $($x $==0$ && y $==0)$

$\{$

txtOutput.Text $=$ "You are in a room with an exit to the South or Southeast.";

btnNorth.Enabled $=$ false;

btnEast.Enabled $=$ false;

btnSouth.Enabled $=$ true;

btnWest.Enabled $=$ false;

btnNortheast.Enabled $=$ false;

btnSoutheast.Enabled $=$ false;

btnNorthwest.Enabled $=$ false;

btnSouthwest.Enabled $=$ false;

$//$btnWest$.$Visible $=$ false;

txtY$.$Text $="1"$;

$\}$

else if $($x $==0$ && y $==-1)$

$\{$

txtOutput.Text $=$ "You are in a room with an exit to the North, Northeast, Northwest, South, Southeast, Southwest, East, and West.";

btnNorth.Enabled $=$ true;

btnEast.Enabled $=$ true;

btnSouth.Enabled $=$ true;

btnWest.Enabled $=$ true;

btnNortheast.Enabled $=$ true;

btnSoutheast.Enabled $=$ true;

btnNorthwest.Enabled $=$ true;

btnSouthwest.Enabled $=$ true;

$//$btnWest$.$Visible $=$ false;

txtY$.$Text $="0"$;

$\}$

$\}$

private void btnSouth$\_$Click$($object sender$,$ EventArgs e$)$

$\{$

int x $=$ Convert.ToInt$32($txtX$.$Text$)$;

int y $=$ Convert.ToInt$32($txtY$.$Text$)$;

if $($x $==0$ && y $==0)$

$\{$

txtOutput.Text $=$ "You are in a room with an exit to the North or Northeast.";

btnNorth.Enabled $=$ true;

btnEast.Enabled $=$ false;

btnSouth.Enabled $=$ false;

btnWest.Enabled $=$ false;

btnNortheast.Enabled $=$ false;

btnSoutheast.Enabled $=$ false;

btnNorthwest.Enabled $=$ false;

btnSouthwest.Enabled $=$ false;

txtY$.$Text $="-1"$;

$\}$

else if $($x $==0$ && y $==1)$

$\{$

txtOutput.Text $=$ "You are in a room with an exit to the North, Northeast, Northwest, South, Southeast, Southwest, East, and West.";

btnNorth.Enabled $=$ true;

btnEast.Enabled $=$ true;

btnSouth.Enabled $=$ true;

btnWest.Enabled $=$ true;

btnNortheast.Enabled $=$ true;

btnSoutheast.Enabled $=$ true;

btnNorthwest.Enabled $=$ true;

btnSouthwest.Enabled $=$ true;

txtY$.$Text $="0"$;

$\}$

$\}$

private void btnEast$\_$Click$($object sender$,$ EventArgs e$)$

$\{$

int x $=$ Convert.ToInt$32($txtX$.$Text$)$;

int y $=$ Convert.ToInt$32($txtY$.$Text$)$;

if $($x $==0$ && y $==0)$

$\{$

txtOutput.Text $=$ "You are in a room with a lever in it and an exit to the West or Southwest.";

btnNorth.Enabled $=$ false;

btnEast.Enabled $=$ false;

btnSouth.Enabled $=$ false;

btnWest.Enabled $=$ true;

btnNortheast.Enabled $=$ false;

btnSoutheast.Enabled $=$ false;

btnNorthwest.Enabled $=$ false;

btnSouthwest.Enabled $=$ false;

btnAction.Visible $=$ true;

btnAction.Text $=$ "Pull Lever?";

txtX$.$Text $="1"$;

$\}$

else if $($x $==-1$ && y $==0)$

$\{$

txtOutput.Text $=$ "You are in a room with an exit to the North, Northeast, Northwest, South, Southeast, Southwest, East, and West.";

btnNorth.Enabled $=$ true;

btnEast.Enabled $=$ true;

btnSouth.Enabled $=$ true;

btnWest.Enabled $=$ true;

btnNortheast.Enabled $=$ true;

btnSoutheast.Enabled $=$ true;