Unity 5 array.Add

Hello guys, it seems that this method does not anymore. Could someone tell me how to add an integer to the existing array without nothing between those?

int[] tablica = new int[]{liczba1,liczba2};

//then i want to add another integer

tablica.Add(liczba3);

// Does not work. I see a message:error CS1061: Type `int[]' does not contain a definition //for `Add' and no extension method `Add' of type `int[]' could be found (are you missing a //using directive or an assembly reference?)

Thank you for any reply.

You are using a fixed length array and as a result you are not able to add anything to this without redefining it at a larger size and adding the new item to the end of the array.

You are probably wanting to use a 1 which has both variable length and access to the Add method ass seen on the provided link.