Generics Operator test, C#

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//Title of this code
//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
	class Gen<T> 
	{

T ob1,ob2;

public Gen(ref T o,ref T p)
		{

ob1=o;
            ob2=p;

}

public T GetOb()
		{

return (ob1+ob2);
            //return ob1;

}
        
        public object GetObAdd<T>(object ob1,object ob2)
		{

return (ob1+ob2);
            //return ob1;

}
       /*
        public T GetOb1()
		{

return ob1;

}
       public T GetOb2()
		{

return ob2;

}
        
        */

public void ShowType() 
		{

Console.WriteLine("Type of T is " + typeof(T));

}

public class Program
	{
		public static void Main(string[] args)
		{
           // Gen<T> test = new Gen<T>(T,T);
		     //Gen<int> iOb;
            dynamic iOb;
            int x,y;
            x=100;y=200;
			iOb = new Gen<int>(ref x,ref y);

iOb.ShowType();

int v = iOb.GetOb();
			Console.WriteLine("value: " + v);

/*int v1 = iOb.GetOb1();
			Console.WriteLine("value: " + v1);
            
            int v2 = iOb.GetOb2();
			Console.WriteLine("value: " + v2);*/
            
			Console.WriteLine();

string s1,s2;
            s1="Hii";
            s2="Generics add power.";
			iOb = new Gen<string>(ref s1,ref s2);

iOb.ShowType();

string str = iOb.GetOb();
			Console.WriteLine("value: " + str);
            
           /* string str1 = strOb.GetOb1();
			Console.WriteLine("value: " + str1);
            string str2 = strOb.GetOb2();
			Console.WriteLine("value: " + str2);*/
            
             //iOb=strOb;
             //iOb.ShowType();
			
			
		}
	}
}

Show compiler warnings [ + ] Show input
Compilation time: 0.08 sec, absolute running time: 0.06 sec, cpu time: 0.06 sec, average memory usage: 14 Mb, average nr of threads: 3