using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Text;
using System.Security.Cryptography;
class MyClass : IDisposable
{
private Stream myStream = null;
public void Dispose()
{
Stream s = myStream;
if (s != null)
((IDisposable)s).Dispose();
}
}
public class MainClass
{
public static void Main()
{
using (MyClass mc = new MyClass())
{
}
}
}
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