Generic 2 parameters hierarchy, C#

Generic 2 parameters hierarchy

//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
{
    
    
   
        
        public class GenBase<T,V>
        {
            
           public T tbase;
           public V vbase;
             public GenBase()
           {
             
           }
               
            
           public GenBase(T t,V v)
           {
               tbase=t;
               vbase=v;
           }
             public GenBase(V v,T t)
           {
               tbase=t;
               vbase=v;
           }
             public GenBase(T t)
           {
               tbase=t;
               
           }
             public GenBase(V v)
           {
               
               vbase=v;
           }
            
            public void BDisplay()
            {
                Console.WriteLine("Base_t: "+tbase);
                Console.WriteLine("Base_v: "+vbase);
                
            }
            
            
        }
        
        public class GenDerive<T,V>:GenBase<T,V> 
        {
          T tderiv;
            
            public GenDerive(T t)
            {
                tderiv=t;              
            }
             public GenDerive(T t,V v):base(v)
           {
               tderiv=t;
               
           }
            public void DDisplay()
            {
                Console.WriteLine("Deriv_t: "+tderiv);
                Console.WriteLine("Base_v: "+vbase);
                
            }
            
        }
     public class Program
    {
        public static void Main(string[] args)
        {
            GenBase<int,string> gb=new GenBase<int,string>(10,"Hello");
            GenBase<string,int> gb2=new GenBase<string,int>("Hello",10);
            GenDerive<string,int> gd=new GenDerive<string,int>("Hii",10);
            GenDerive<int,string> gd2=new GenDerive<int,string>(10,"Hii");
            gb.BDisplay();
            Console.WriteLine();
            gb2.BDisplay();
            Console.WriteLine();
            gd.DDisplay();
            Console.WriteLine();
            gd.BDisplay();
            Console.WriteLine();
            gd2.DDisplay();
            Console.WriteLine();
            gd2.BDisplay();
            
            
        }
    }
}


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