c#位图行和列帮助

我想有一个位图或图片(不确定)的行和列，这样说，如果我设置10行和10列，那么它必须建立一个类(不确定)与行和列宽度10和高度10，这样我可以访问任何位置，并设置图像在任何地方的盒子/位置我怎么做?提前谢谢你

比如我传递

private printGrid(int x, int y) {
  // this function will print x rows and y columns such that each box's width is 10 px and height is 10px and also a way to modify any (x,y) in this to hold an image of 5px at later time
}
private insertImage(Image img, int x, int y) {
  // inserts the image in the xth row and yth column
}

如何在c#中做到这一点?

void AddBox(int row, int col, Image mainImage, Image otherImage) {
     using(Graphics g = Graphics.FromImage(mainImage)) {
          g.DrawImage(otherImage, col * 10, row * 10);
     }
}