Asp.net mvc 3 助手方法不打印任何内容

我在视图中创建了一个助手方法，如下所示：

@helper DisputeOpenedDays(DateTime createdDate)
    {

        TimeSpan difference = DateTime.Now.Subtract(createdDate);
        string.Format("0", difference.Days);
}

当我这样用它的时候

@DisputeOpenedDays(myobj.CreatedAt)

它不打印任何内容

请尝试：

string.Format("{0}", difference.Days);

缺少花括号。

请尝试：

string.Format("{0}", difference.Days);

@helper DisputeOpenedDays(DateTime createdDate)
{
 TimeSpan difference = DateTime.Now.Subtract(createdDate);
 @string.Format("{0}", difference.Days);
}

花括号不见了

@helper DisputeOpenedDays(DateTime createdDate)
{
 TimeSpan difference = DateTime.Now.Subtract(createdDate);
 @string.Format("{0}", difference.Days);
}