- ToUnixTimestamp method

tUtils/Class1.cs

-using System;
-
-namespace tUtils
-{
-    public class Class1
-    {
-    }
-}

tUtils/Utils.cs

+using System;
+
+namespace tUtils
+{
+    public static class Utils
+    {
+        public static long ToUnixTimestamp(this DateTime date)
+        {
+            TimeSpan span = (date.ToUniversalTime() - new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc));
+            return (long)span.TotalMilliseconds;
+        }
+    }
+}