在SQL服务器（T-SQL），你可以一个DateTime变量转换为AA十进制值是这样的：

In SQL Server(T-SQL) you can convert a DateTime variable to a a decimal values like this:

CONVERT(DECIMAL(20,10),@mytime)
Sample Input: 2012-07-27 08:29:20.000
Sample Output: 41115.3537037037

有没有转换的日期时间在.NET（C＃或VB）同类型小数的任何等同方法？

Is there any equivalent method of converting a DateTime in .NET(C# or VB) to the same type of decimal?

我期待在不同的日子比较倍。

I am looking to compare times on different days.

计算

41115.3537037037 % 1 = .3537037037

这可以让我轻松地在不同日期比较次。

This would allow me to easily compare times on different dates.

推荐答案

看起来，这是自1900年1月1日的天数。在这种情况下，你会使用：

It looks like this is "number of days since 1st January 1900". In which case, you'd use:

DateTime epoch = new DateTime(1900, 1, 1);
TimeSpan difference = date - epoch;
double days = difference.TotalDays;