how to display timezone list in dropdown in asp.net.

I am not getting it in GMT format. Its displaying as UTC format.
Currently using Below function:

public Collection<mystruct> GetTimeZones()
{
var myClass = new Collection<mystruct>();
foreach (var timeZoneInfo in TimeZoneInfo.GetSystemTimeZones())
{
myClass.Add(new MyStruct { Name = timeZoneInfo.DisplayName, ID = timeZoneInfo.Id });


}
return myClass;
}
public struct MyStruct
{
public string Name { get; set; }
public string ID { get; set; }
}