System.Net.WebException | UnauthorizedAccessException c#

I have a problem and I searched hours to find a solution but there was nothing that fixed my error. So I'll coded a button and the button should download a File and place it in a directory via DownloadFile(); But everytime if I try to download the File VS show me this error UnauthorizedAccessException The access of [C:\User...] is denied + System.Net.WebException. Here's my code.

        private void button1_Click(object sender, EventArgs e)
        {
        WebClient Client = new WebClient();
        string Download = 
        "http://zentrixdevelopers.com/downloads/Debug.rar";
        string Location = 
        Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) 
        +                         
        @"\Zentrix\Update";
        Directory.GetAccessControl(Location);

        Client.DownloadFile(Download, Location);
        if (!Directory.Exists(Location))
        {
        DirectoryInfo Folder = 


         Directory.CreateDirectory(Environment.GetFolderPath
         (Environment.SpecialFolder.ApplicationData) + @"\Zentrix");
        }                 

        this.Close();
        }

Usually it should work but it doesn't.