public static async Task <string> GetSvgContent(string plantUmlSource)
 {
     try
     {
         return(await HttpClient.GetStringAsync(PlantUMLUrl.SVG(plantUmlSource)));
     }
     catch (HttpRequestException e)
     {
         Console.WriteLine(e);
         return(null);
     }
 }
 public static string GetImageUrl(string plantUmlSource)
 {
     return(PlantUMLUrl.PNG(plantUmlSource));
 }