It throws IndexOutOfRangeException with this data

        {
            {1, 0, 0, 0, 0, 1, 1, 0, 0, 1},
            {1, 0, 1, 0, 0, 0, 0, 0, 0, 1},
            {1, 0, 1, 0, 1, 2, 1, 0, 0, 0},
            {1, 0, 0, 0, 0, 0, 0, 0, 0, 0},
            {0, 0, 0, 0, 0, 0, 0, 0, 1, 0},
            {0, 0, 0, 0, 1, 1, 1, 0, 0, 0},
            {0, 0, 0, 0, 0, 0, 0, 0, 1, 0},
            {0, 0, 0, 1, 0, 0, 0, 0, 0, 1},
            {0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
            {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
        };
        ```

I think that it is not working correct.

1. If the number of ships is less than it should be, your code returns true, but should return false. It return true even if there are no ships at all.
2. Also it returns true when the ships contact by their corners:
   int[,] field = new int[10, 10]
   {{1, 0, 0, 1, 0, 1, 1, 0, 0, 0},
   {1, 0, 1, 0, 0, 0, 0, 0, 1, 0},
   {1, 0, 1, 0, 1, 1, 1, 0, 1, 0},
   {1, 0, 0, 0, 0, 0, 0, 0, 0, 0},
   {0, 0, 0, 0, 1, 0, 0, 0, 1, 0},
   {0, 0, 0, 0, 1, 0, 1, 0, 0, 0},
   {0, 0, 0, 0, 1, 0, 0, 0, 1, 0},
   {0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
   {0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
   {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}};