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casting with a generic type

VanilleBertVanilleBert Posts: 29Member
Hi all,

I have a problem I can't express in english, so please look at the code and try to compile it.

using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication1
// base class
class Class1
public bool castable;
public int ID;

public Class1(int id)
ID = id;
castable = false;

// based on Class1
class Class2 : Class1
public T Value; // value with no concrete type

public Class2(int id, T value)
: base(id)
Value = value;
castable = true;

class Program
static void Main(string[] args)
Random Random = new Random();
List TheList = new List();
for (int i = 0; i < 100; i++)
TheList.Add(new Class1(Random.Next(1000)));
TheList.Add((Class1)new Class2(Random.Next(1000), Random.Next(1000)));
TheList.Add((Class1)new Class2(Random.Next(1000), Random.NextDouble()));

foreach (Class1 c in TheList)
Console.Write(c.ID.ToString() + " ");
if (c.castable)
{ // This is wrong.
Class2 casted = (Class2)c; // TODO
// No idea how to go on.
Console.WriteLine("not castable");
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