[C#] Convert C# to Java, Java to C# - UTC

    public static DateTime JavaToCSharpUTC(long javaLong)
    {
        DateTime Jan1st1970 = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
        DateTime result = Jan1st1970.AddMilliseconds(javaLong).ToUniversalTime();
 
        return result;
    }
 
    public static long CSharpToJavaUTC(long ticks)
    {
        DateTime Jan1st1970 = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
 
        return ticks - Jan1st1970.Ticks;
    }