using System;

using System.Net;

​

public class Program

{

    public static void Main()

    {

        // checking for remote image

        var _output = isExistsImageOnRemoteURL();

        // here displaying output

        Console.WriteLine(_output);

    }

​

    private static string isExistsImageOnRemoteURL()

    {

        try

        {

            // Web Request

            HttpWebRequest httpReq = (HttpWebRequest)WebRequest.Create("https://1.bp.blogspot.com/-uiUa11k2I3g/XO60ddJuDWI/AAAAAAAAC3I/VIGXSIRIUfU05iJK-Efdp4B-A_PteXJfwCLcBGAs/s320/http-500-Internal-Server-Error.png");

            // Web Response

            HttpWebResponse httpRes = (HttpWebResponse)httpReq.GetResponse(); // Error 404 exactly right here

            // Close the response.

            httpRes.Close();

        }

        catch (WebException wec)

        {

            if (wec.Status == WebExceptionStatus.ProtocolError)

            {

                return ((HttpWebResponse)wec.Response).StatusCode.ToString();

            }

        }

​

        return "Image Exists!";

    }

}