using System;

public class Program

{

    public static void ArrayPush<T>(ref T[] table, object value)

    {

        Array.Resize(ref table, table.Length + 1); // Resizing the array for the cloned length (+-) (+1)

        table.SetValue(value, table.Length - 1); // Setting the value for the new element

    }

​

    public static void MergeArrays<T>(ref T[] tableOne, T[] tableTwo) {

        foreach(var element in tableTwo) {

            ArrayPush(ref tableOne, element);

        }

    }

    public static void Main()

    {

        string[] words = { "hi", "cool", "hello" };

        string[] someWords = { "kill", "him", "lol" };

        MergeArrays(ref words, someWords);

        // remove ref and create new array to do not push into other array ;P

        Array.ForEach(words, e => Console.WriteLine(e));

        // "hi"

        // "cool"

        // "hello"

        // "kill"

        // "him"

        // "lol"

    }

}