Union Two Lists

class Data_structure
    {
        public static void Main()
        {
            int []la={3,5,8,11};
            int []lb={2,6,8,9,11,15,20};
            int []lc=new int[11];
            int i=0,j=0,k=0;
        while(i<la.Length && j<lb.Length)
            {
                if(la[i]<=lb[j])
                {
                    lc[k++]=la[i++];
                }
                else
                {
                    lc[k++]=lb[j++];
                }                
            }
            while(i<la.Length)
            {
                lc[k++]=la[i++];
            }
            while(j<lb.Length)
            {
                lc[k++]=lb[j++];
            }  
            foreach(int element in lc)
                Console.Write(element+"\t");
            Console.Read();
        }
    }