CSHARP

add two numbers in c#

using System;

namespace Add{
	public class Program{

		public static int addition(int a, int b){
			return (a+b);
		}

		public static void Main(){
			int a,b;
			int sum;

			Console.Write("Enter first number: ");
			a = Convert.ToInt32(Console.ReadLine());

			Console.Write("Enter second number: ");
			b = Convert.ToInt32(Console.ReadLine());

			sum = addition(a,b);

			Console.WriteLine("Sum is: " + sum);
		}
	}
}

C# add two numbers using a method

using System;
public class Program
{
  public static void Main(String[] args)
  {
    int a = 1;
    int b = 2;
    int answer = sum(a,b);//calling the method
    Console.WriteLine(answer);
  }
  //sum is a method
  static int sum(int a,int b) 
  {
    return a+b;
  }
}