Console-Based Matrix Editor in C#

ConsoleBasedMatrixEditor.cs

char[,] matrix = new char[,]
{
    { 'x', '-', '-', 'x', 'x'},
    { 'x', '-', '-', 'x', 'x'},
    { 'x', '-', '-', 'x', 'x'},
};

int x = 0;
int y = 0;

while (true)
{
    PrintMatrix();
    Console.SetCursorPosition(x, y);
    ReadAndProcessKey();
}

void ReadAndProcessKey()
{
    var key = Console.ReadKey();
    if (key.Key == ConsoleKey.LeftArrow)
        x--;
    if (key.Key == ConsoleKey.RightArrow)
        x++;
    if (key.Key == ConsoleKey.UpArrow)
        y--;
    if (key.Key == ConsoleKey.DownArrow)
        y++;
    EnsureCoordinatesAreInTheMatrix();
    if (key.Key == ConsoleKey.Spacebar)
    {
        if (matrix[y, x] == 'x')
            matrix[y, x] = '-';
        else
            matrix[y, x] = 'x';
    }
}

void EnsureCoordinatesAreInTheMatrix()
{
    if (x < 0)
        x = 0;
    if (x > matrix.GetLength(1) - 1)
        x = matrix.GetLength(1) - 1;
    if (y < 0)
        y = 0;
    if (y > matrix.GetLength(0) - 1)
        y = matrix.GetLength(0) - 1;
}

void PrintMatrix()
{
    Console.Clear();
    for (int row = 0; row < matrix.GetLength(0); row++)
    {
        for (int col = 0; col < matrix.GetLength(1); col++)
        {
            Console.Write(matrix[row, col]);
        }
        Console.WriteLine();
    }
}