C# part of my battleships wpf application

battleshipsWPF.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Text.RegularExpressions;

// number code:
// 0 - water
// 1 - ship
// 2 - hit ship
// 3 - hit water

namespace battleships
{
    public partial class MainWindow : Window
    {
        private Random rand;
        private int[,] field;
        private Regex reg;
        private TextBlock output;
        private Dictionary<string, Button> ButtonDict = new Dictionary<string, Button>();
        private int shots = 0;
        private int hits = 0;
        private int misses = 0;
        public MainWindow()
        {
            InitializeComponent();
            this.rand = new Random();
            this.reg = new Regex(@"^\d,\d$", RegexOptions.IgnoreCase);
            this.CreateField();
            this.FillField();
            scoreboard.Content = "shots:\r\n" + this.shots + "\r\nhits:\r\n" + this.hits + "\r\nmisses:\r\n" + this.misses;
        }

        private void Output_Loaded(object sender, RoutedEventArgs e)
        {
            this.output = sender as TextBlock;
        }

        public void handleFieldClick(object sender, RoutedEventArgs e)
        {
            Button b = (Button)sender;
            string[] coords = b.Name.Split('y');
            coords[0] = coords[0].Replace("x", "");
            // buttons start at 1,1 array at 0,0
            int x = int.Parse(coords[0]) - 1;
            int y = int.Parse(coords[1]) - 1;
            
            if (this.field[y, x] == 1)
            {
                this.output.Text = "That's a hit!";
                b.Background = Brushes.Green;
                this.field[y, x] = 2;
                this.hits += 1;
                this.shots += 1;
            }
            else if (this.field[y, x] == 0) 
            {
                b.Background = Brushes.Blue;
                this.output.Text = "That was a shot in the water!";
                this.misses += 1;
                this.field[y, x] = 3;
                this.shots += 1;
            }
            else if (this.field[y, x] == 2 || this.field[y, x] == 3) 
            {
                this.output.Text = "You already shot there.";              
            }
            scoreboard.Content =  "shots:\r\n" + this.shots + "\r\nhits:\r\n" + this.hits + "\r\nmisses:\r\n" + this.misses;
        }
        
        private void CreateField()
        {
            // setup empty field

            this.field = new int[10, 10] {
                {0,0,0,0,0,0,0,0,0,0},
                {0,0,0,0,0,0,0,0,0,0},
                {0,0,0,0,0,0,0,0,0,0},
                {0,0,0,0,0,0,0,0,0,0},
                {0,0,0,0,0,0,0,0,0,0},
                {0,0,0,0,0,0,0,0,0,0},
                {0,0,0,0,0,0,0,0,0,0},
                {0,0,0,0,0,0,0,0,0,0},
                {0,0,0,0,0,0,0,0,0,0},
                {0,0,0,0,0,0,0,0,0,0}
            };
        }

        // place the ships the player is supposed to shoot at in the end 
        private void FillField()
        {
            // Patrol boat
            this.GenerateShip(2);
            // Destroyer
            this.GenerateShip(3);
            // Submarine
            this.GenerateShip(3);
            // Battleship
            this.GenerateShip(4);
            // Aircraft Carrier
            this.GenerateShip(5);
        }

        public bool GetRandomBoolean()
        {
            return this.rand.Next(0, 2) == 0;
        }

        private void GenerateShip(int size)
        {
            int num1 = this.rand.Next(0, 10);
            int num2 = this.rand.Next(0, 10);
            bool horizontal = this.GetRandomBoolean();
            bool valid = false;

            while (true)
            {
                if (horizontal)
                {
                    for (var i = 0; i < size; i++)
                    {
                        bool right, left, up, down = false;
                        try
                        {
                            right = this.field[num1 + i + 1, num2] == 1;
                        }
                        catch (IndexOutOfRangeException e)
                        {
                            right = false;
                        }
                        try
                        {
                            left = this.field[num1 + i - 1, num2] == 1;
                        }
                        catch (IndexOutOfRangeException e)
                        {
                            left = false;
                        }
                        try
                        {
                            up = this.field[num1 + i, num2 + 1] == 1;
                        }
                        catch (IndexOutOfRangeException e)
                        {
                            up = false;
                        }
                        try
                        {
                            down = this.field[num1 + i, num2 - 1] == 1;
                        }
                        catch (IndexOutOfRangeException e)
                        {
                            down = false;
                        }

                        if (num1 + i > 9) // index out of range
                        {
                            valid = false;
                            break;
                        }
                        else if (this.field[num1 + i, num2] == 1)
                        {
                            valid = false;
                            break;
                        } 
                        else if (up || down || right || down)
                        {
                            valid = false;
                            break;
                        }
                        else if (num1 + i > 8 || num1 + i < 1 || num2 > 8 || num2 < 1)
                        {
                            valid = false;
                            break;
                        }
                        valid = true;
                    }
                    if (valid)
                    {
                        for (var i = 0; i < size; i++)
                            this.field[num1 + i, num2] = 1;
                        valid = false;
                        break;
                    }
                }
                else
                {
                    for (var i = 0; i < size; i++)
                    {
                        bool right, left, up, down = false;
                        try
                        {
                            right = this.field[num1 + i + 1, num2] == 1;
                        }
                        catch (IndexOutOfRangeException e)
                        {
                            right = false;
                        }
                        try
                        {
                            left = this.field[num1 + i - 1, num2] == 1;
                        }
                        catch (IndexOutOfRangeException e)
                        {
                            left = false;
                        }
                        try
                        {
                            up = this.field[num1 + i, num2 + 1] == 1;
                        }
                        catch (IndexOutOfRangeException e)
                        {
                            up = false;
                        }
                        try
                        {
                            down = this.field[num1 + i, num2 - 1] == 1;
                        }
                        catch (IndexOutOfRangeException e)
                        {
                            down = false;
                        }

                        if (num2 + i > 9) // index out of range
                        {
                            valid = false;
                            break;
                        }
                        else if (this.field[num1, num2 + i] == 1)
                        {
                            valid = false;
                            break;
                        }
                        else if (up || down || right || down)
                        {
                            valid = false;
                            break;
                        }
                        else if (num1 > 8 || num1 < 1 || num2 + i > 8 || num2 + i < 1)
                        {
                            valid = false;
                            break;
                        }
                        valid = true;
                    }
                    if (valid)
                    {
                        for (var i = 0; i < size; i++)
                        {
                            this.field[num1, num2 + i] = 1;
                        }
                            
                        valid = false;
                        break;
                    }
                }
                num1 = this.rand.Next(0, 10);
                num2 = this.rand.Next(0, 10);
                horizontal = this.GetRandomBoolean();
            }
        }
    }
}