怪
写成SessionUtil.IsNull(SessionUtil.Session_Account)
就报 "System.StackOverflowException "的错误

写成SessionUtil.IsNull( "Account ")就没事
搞不懂啊????????

public static bool IsNull(string name)
{
if (HttpContext.Current.Session[name] == null)
return true;
else
return false;
}

private const string SESSIONNAME_ACCOUNT = "Account ";

public static string Session_Account
{
get { return Session_Account; }
}

[解决办法]
public static string Session_Account
{
get { return Session_Account; }
}

死循环 不overflow才怪
[解决办法]
死循环