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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace EntityMapper.Service
{
public class BusinessService
{
private static BusinessService _instance;
public static BusinessService Instance
{
get
{
if (null == _instance)
{
_instance = new BusinessService();
}
return _instance;
}
}
public string GetNextInvoiceNo()
{
return string.Format("I{0:000000}", getTime() % 1000000);
}
private static DateTime JanFirst1970 = new DateTime(1970, 1, 1);
private static long getTime()
{
return (long)((DateTime.Now.ToUniversalTime() - JanFirst1970).TotalMilliseconds + 0.5);
}
}
}
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