Merge multidimensional array

It can be done in 2 lines if you replace arrays with lists:

List> result = new List>(list1);
result.AddRange(list2);

;)

Thanks, that what i wanted to do but i was hoping there was a way to do it without looping each element. But at least it works.

        static void Main(string[] args)
        {
            float[,] arr1 = new float[3, 2] { { 0, 12 }, { 1, 25 }, { 2, 45 } };
            float[,] arr2 = new float[3, 2] { { 0, 9 }, { 1, 17 }, { 2, 29 } };
 
            int d1 = arr1.GetLength(0) + arr2.GetLength(0);
            int d2 = arr1.GetLength(1) > arr2.GetLength(1) ? arr1.GetLength(1) : arr2.GetLength(1);
            float[,] result = new float[d1, d2];
 
            AddToArray(result, arr1);
            AddToArray(result, arr2, arr1.GetLength(0));
 
            for (int i = 0; i < result.GetLength(0); ++i)
            {
                for (int j = 0; j < result.GetLength(1); ++j)
                {
                    Console.Write(result[i, j] + " ");
                }
                Console.WriteLine();
            }
            Console.ReadKey();
        }
 
        static void AddToArray(float[,] result, float[,] array, int start = 0)
        {
            for (int i = 0; i < array.GetLength(0); ++i)
            {
                for (int j = 0; j < array.GetLength(1); ++j)
                {
                    result[i + start, j] = array[i, j];
                }
            }
        }

It's a bit more complicated than I thought. There are no simple conversions from [,] array, since this type of array is not multi-dimensional in the same way that the others are, for example List> or int[][], where you have list of lists or pointer of pointers.

I cant change anglesEut because it is used by other parts of the program. I can only change the contained data.
anglesEut = (float[,])eut1.Clone();

Clone() sems like it dose what i want to do but i also want to add the data in eut2 after eut1.
eut1
0, 12
1, 25
2, 45
eut2
0, 9
1, 17
2, 29
anglesEut
0 12
1 25
2 45
0 9
1 17
2 29

array1:
123
456

array2:
78
99
12

Do you want this:

12378
45699
12

or this:

12378
45699
00012

"this.anglesEut = eut1;" - this simply makes anglesEut reference to the the eut1. You have to clone the array:

anglesEut = (float[,])eut1.Clone();

In any case, it'll be simpler to use list with its AddRange method. List can then return an array copy of itself.