C#取客户端UTC时间解决方案

/// <summary>
/// Convert DateTime To Milliseconds
/// </summary>
/// <param name="dt">the datetime</param>
/// <returns></returns>
public static long GetTotalTolMilliseconds(DateTime dt)
{
string str = new JavaScriptSerializer().Serialize(dt);
long result = 0;

str = Regex.Replace(str, @"[^\d.\d]", "");

if (str != null && str != string.Empty)
{
// clear not number but keep dot
str = Regex.Replace(str, @"[^\d.\d]", "");
// if a number
if (Regex.IsMatch(str, @"^[+-]?\d*[.]?\d*$"))
{
result = long.Parse(str);
}
}
return result;
}