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@{var typeId = Request.QueryString["cid"];
int? cid;
cid = (string.IsNullOrEmpty(typeId) ? null : ( Convert.ToInt32( typeId)) );
}
@{var typeId = Request.QueryString["cid"];
int? cid;
if (string.IsNullOrEmpty(typeId))
{cid = null;}
else
{cid = Convert.ToInt32(typeId);}
}