查找二维字符串数组的唯一行输出

Question

I have the following string;

string[,] test=
{
  {"0","0"},
  {"0","0"},
  {"0","0"},
  {"0","1"},
  {"5","0"},
};

I'd like to find a way to search the array for all lines that are unique. So my desired output array would be.

string[,] output=
{
  {"0","0"},
  {"0","1"},
  {"5","0"},
};

Does anyone have any simple ideas on how to achieve this?

Answer 1

you can do this with linq just call Distinct to select only unique values, like this

var query = (from arr in test
             from value in arr
             select value).Distinct();

or you can try the following method, This simply flattens the nested arrays into a sequence and calls Distinct to find the distinct elements. source this answer

var distinct = test.SelectMany(a => a).Distinct().ToArray();