此方法用于创建一个新的DateTime对象，该对象的跳动次数与指定的DateTime相同，但被指定为本地时间，协调世界时(UTC)或都不指定，如指定的DateTimeKind值所示。
Syntax: public static DateTime SpecifyKind (DateTime value, DateTimeKind kind);
Parameters:
value: It is the date and time.
kind: It is one of the enumeration values which indicates whether the new object represents local time, UTC, or neither.
Return Value: This method returns a new object that has the same number of ticks as the object represented by the value parameter and the DateTimeKind value specified by the kind parameter.
下面的程序说明了DateTime.SpecifyKind(DateTime，DateTimeKind)方法的用法：
范例1：
// C# program to demonstrate the
// DateTime.SpecifyKind(DateTime,
// DateTimeKind) Method
using System;
using System.Globalization;
class GFG {
// Main Method
public static void Main()
{
// creating object of DateTime
DateTime date = new DateTime(2005, 5,
6, 14, 34, 42);
Console.WriteLine("Kind Before Using Method: "
+date.Kind);
// getting DateTime of same DateTime
// instance using SpecifyKind() method
DateTime value = DateTime.SpecifyKind(date,
DateTimeKind.Local);
Console.WriteLine("Kind After Using Method: " +
value.Kind);
Console.WriteLine("DateTime is {0}",
value);
}
}
输出：
Kind Before Using Method: Unspecified
Kind After Using Method: Local
DateTime is 05/06/2005 14:34:42
范例2：
// C# program to demonstrate the
// DateTime.SpecifyKind(DateTime,
// DateTimeKind) Method
using System;
using System.Globalization;
class GFG {
// Main Method
public static void Main()
{
// creating object of DateTime
DateTime date = new DateTime(1970, 1,
1, 4, 0, 15);
// getting DateTime of same DateTime
// instance using SpecifyKind() method
DateTime value = DateTime.SpecifyKind(date,
DateTimeKind.Local);
Console.WriteLine("DateTime is {0}", value);
}
}
输出：
DateTime is 01/01/1970 04:00:15
参考：
- https://docs.microsoft.com/zh-cn/dotnet/api/system.datetime.specifykind?view=netframework-4.7.2