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Application.Lock();
Application.["UserCount"]=0;
Application.Unlock();
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Application.Lock();
Application["UserCount']=Int32.Parse(Application["UserCount"].Tostring())+1;
Application.UnLock();
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Application.Lock();
Application["UserCount"]=Int32.Parse(Application["UserCount"].Tostring())-1;
Application.UnLock();
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Response.Write(Application["UserCount"].Tostring());
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using System;
using System.Diagnostics;
namespace MyAppException
{
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