C# program to check whether a date and time in a particular time zone is ambiguous (TimeZoneInfo.IsAmbiguousTime() Method)

Program:

The source code to check whether a date and time in a particular time zone is ambiguous is given below. The given program is compiled and executed successfully.

using System;
using System.Globalization;
using System.Collections.ObjectModel;

class TimeZoneInfoDemo
{
    //Entry point of Program
    static public void Main()
    {
        DateTime ambiguousTime;

        TimeZoneInfo timeZone1 = TimeZoneInfo.FindSystemTimeZoneById("Central Standard Time");
        TimeZoneInfo timeZone2 = TimeZoneInfo.FindSystemTimeZoneById("UTC");

        ambiguousTime = new DateTime(2007, 11, 4, 1, 0, 0);

        if (timeZone1.IsAmbiguousTime(ambiguousTime))
            Console.WriteLine("Time is ambiguous");
        else
            Console.WriteLine("Time is not ambiguous");

        if (timeZone2.IsAmbiguousTime(ambiguousTime))
            Console.WriteLine("Time is ambiguous");
        else
            Console.WriteLine("Time is not ambiguous");
    }
}

Output:

Time is ambiguous
Time is not ambiguous
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