C# 自定义泛型二维数组

public class Array2D{

    public int Width { get; }
    public int Height { get; }
    public T[] Data { get; }
    public Array2D(int width, int height)
    {
        Width = width;
        Height = height;
        Data = new T[width * height];
    }

    public T this[int x, int y]
    {
        get => Data[y * Width + x];
        set => Data[y * Width + x] = value;
    }
    public T this[(int x, int y) index]
    {
        get => Data[index.y * Width + index.x];
        set => Data[index.y * Width + index.x] = value;
    }
}