quite a bit, too much to summarize here

WindowsFormsApplication2/Utils.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace JellyfinRPC
+{
+    class Utils
+    {
+        public static long DateTimeInUnix(DateTime dateTime)
+        {
+            long unixTimestamp = dateTime.Ticks - new DateTime(1970, 1, 1).Ticks;
+            unixTimestamp /= TimeSpan.TicksPerSecond;
+            return unixTimestamp;
+        }
+    }
+}