Now can download videos

FoxTube/Classes/Methods.cs

@@ -1,6 +1,8 @@
 using Google.Apis.YouTube.v3;
 using System;
+using System.Collections.Generic;
 using System.Diagnostics;
+using System.IO;
 using System.Text.RegularExpressions;
 using System.Web;
 using Windows.ApplicationModel.Core;
@@ -31,6 +33,18 @@ namespace FoxTube
             return new Uri(url);
         }
 
+        public static string ReplaceInvalidChars(this string str, char newValue)
+        {
+            foreach (char i in Path.GetInvalidFileNameChars())
+                str = str.Replace(i, newValue);
+            return str;
+        }
+
+        public static string Last(this string[] arr)
+        {
+            return arr[arr.Length - 1];
+        }
+
         public static string GetAgo(DateTime dateTime)
         {
             TimeSpan span = DateTime.Now - dateTime;