Example of basic Arithmetic Operation using Params Array in C#

public class ParamArithmeticOperation

{
        static void Main()

        {
                //calling function

                PerformArithmeticOperation(200,100,"+"); //perform addition

                PerformArithmeticOperation(200,100,"-"); //perform subtraction

                PerformArithmeticOperation(200,100,"*"); //perform multiplication

                PerformArithmeticOperation(200,100,"/"); //perform division
        }

        //called function
        public static void PerformArithmeticOperation(params object[] items)
        {        

        var result = 0;

        switch (Convert.ToString(items[2]))   //items[2] is the operator(s) i.e. +,-,*,/
        {
         case '+': result = Convert.ToInt32(items[0]) + Convert.ToInt32(items[1]); break;
         case '-': result = Convert.ToInt32(items[0]) - Convert.ToInt32(items[1]); break;
         case '*': result = Convert.ToInt32(items[0]) * Convert.ToInt32(items[1]); break;
         case '/': result = Convert.ToInt32(items[0]) / Convert.ToInt32(items[1]); break;

         default: Console.WriteLine("No such operation available");
        }
        Console.WriteLine(result); 
        }
}