[Solved] ASP.Net HttpWebRequest Error: The given paths format is not supported

Hi Developers,

In my project when i am try to download image from a online path i got the following error.

"The given path's format is not supported."

I have using the following code.

if (objRequest.ImageName != "")
{
    string ApplicationFormPath = System.Configuration.ConfigurationManager.AppSettings["CustomerProofDetailsSourceFile"];
    string IdProofImage = "https://yoururl.com/logo.png";
    string image = DownloadImageFromUrl(IdProofImage);
    string imgBase64String = GetBase64StringForImage(IdProofImage);
    objRequest.ImageData = imgBase64String;
}

DownloadImageFromUrl Method:

public string DownloadImageFromUrl(string imageUrl)
{
    string imageString = string.Empty;
    System.Drawing.Image image = null;
    try
    {
        imageUrl = "https://yoururl.com/logo.png";
        System.Net.HttpWebRequest webRequest = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(imageUrl);
        webRequest.AllowWriteStreamBuffering = true;
        webRequest.Timeout = 30000;
        System.Net.WebResponse webResponse = webRequest.GetResponse();
        System.IO.Stream stream = webResponse.GetResponseStream();
        image = System.Drawing.Image.FromStream(stream);
        //imageString = Convert.ToBase64String(image);
        string imgBase64String = GetBase64StringForImage(image.ToString());
        webResponse.Close();
    }
    catch (Exception ex)
    {
        return imageString;
    }
    return imageString;
}

I am trying with google If anyone know how to do this task kindly suggest to complete this task 

Thanking You

Paul.S