How to convert DateTime of type DateTimeKind.Unspecified to DateTime.Kind.Utc in C# (.NET)

Question

I\'ve inherited C# code that has an awful lot of DateTimes where the Kind property is DateTimeKind.Unspecified. These are fed into Datetime.ToUniversalTime() which gives ba

Answer 1

I use an extension method:

public static DateTime SetKind(this DateTime DT, DateTimeKind DTKind)
{        
    var NewDT = New DateTime(DT.Year, DT.Month, DT.Day, DT.Hour, DT.Minute, DT.Second, DT.Millisecond, DTKind);
    Return NewDT;
}

This is much shorter to use in LINQ than having to type out DateTime.SpecifyKind(unspecified, DateTimeKind.Utc) every time.

For example:

table.Where((x) x.StartTimeStampUTC.SetKind(DateTimeKind.Utc).ToString("G") = GUIStartTimeStampTxt.Text)