Video adding and subscriptions finished

VDownload.Core/EventArgs/DownloadTaskEndedSuccessfullyEventArgs.cs

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+using System;
+
+namespace VDownload.Core.EventArgs
+{
+    public class DownloadTaskEndedSuccessfullyEventArgs : System.EventArgs
+    {
+        #region CONSTRUCTORS
+
+        public DownloadTaskEndedSuccessfullyEventArgs(TimeSpan elapsedTime)
+        {
+            ElapsedTime = elapsedTime;
+        }
+
+        #endregion
+
+
+
+        #region PROPERTIES
+
+        public TimeSpan ElapsedTime { get; private set; }
+
+        #endregion
+    }
+}