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System.Security.Cryptography.SHA1
System.Security.Cryptography.SHA1Managed
System.Security.Cryptography.SHA1CryptoServiceProvider
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public class Father
{
public void hand()
{
Console.WriteLine("Father.hand");
}
}
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class Person
    {
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using System;
//¡­ ¡­
//¡­ ¡­
//¡­ ¡­

string sBeepType = s.Replace(sKey,"");
#if NET20
int.TryParse(sBeepType,out beepType); //ÔÚ.net 2.0ÖвÅÓеķ½·¨
#endif
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using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
Thread mythread ;
Socket socket;
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protected override void Dispose( bool disposing )
{
try
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