関連ワード:  csharp get length of 2d array    c# get length of 2d array    c# get dimensions of 2d array    c# get length of multidimensional array    c# get size of 2d array    c# get row length of 2d array    c# get size of multidimensional array    c# get dimensions of multidimensional array    c# length of 2d array