DownloadingFile

using System;
using System.IO;
using System.Net;
using System.Security;


class DownloadingFile
{
    static void Main()
    {
        try
        {
            string remoteUri = "http://www.devbg.org/img/";
            string fileName = "Logo-BASD.jpg";
            string outputFile = @"C:\Downloads\Logo-BASD.jpg";
            string WebResource = null;

            // Create output directory (if necessary)
            string outputFolder = Path.GetDirectoryName(outputFile);
            if (!Directory.Exists(outputFolder))
            {
                Directory.CreateDirectory(outputFolder);
            }

            WebClient myWebClient = new WebClient();
            // Concatenate the domain with the Web resource filename.
            WebResource = remoteUri + fileName;
            Console.WriteLine("Downloading File \"{0}\" from:\n\"{1}\" .......\n\n", fileName, WebResource);
            // Download the Web resource and save it into the current filesystem folder.
            myWebClient.DownloadFile(WebResource, outputFile);
            Console.WriteLine("Successfully Downloaded File \"{0}\" from:\n\"{1}\"", fileName, WebResource);
            Console.WriteLine("\nDownloaded file saved in the following file system folder:\n" + outputFile);
        }
        catch (ArgumentNullException)
        {
            Console.WriteLine("Address or filename parameter is null!");
        }
        catch (WebException)
        {
            Console.WriteLine("Error, becouse one of the following reason:");
            Console.WriteLine("- The URI formed by combining BaseAddress and address is invalid.");
            Console.WriteLine("- Filename is a null reference, or Empty.");
            Console.WriteLine("- An error occurred while downloading data.");
        }
        catch (NotSupportedException)
        {
            Console.WriteLine("The method has been called simultaneously on multiple threads.");
        }
        catch (SecurityException)
        {
            Console.WriteLine("You don't have permission to write to local file!");
        }
    }
}