Get the image from URL to convert to base64

base64.cs

using System.Net;

private string GetBase64StringForImage(string url)
{
    string base64string = "";

    if (url != null)
    {
        try
        {
            var image = new WebClient().DownloadData(url);
            base64string = Convert.ToBase64String(image);
            base64string = "data:image/png;base64," + base64string;
        }
        catch (Exception)
        {
            return base64string;
        }
    }

    return base64string;
}