public static PSPDFActivityType GetValue(NSString constant)
 {
     if (constant == null)
     {
         return(PSPDFActivityType.Null);
     }
     if (constant.IsEqualTo(PSPDFActivityTypeOpenIn))
     {
         return(PSPDFActivityType.OpenIn);
     }
     if (constant.IsEqualTo(UIActivityTypePostToFacebook))
     {
         return(PSPDFActivityType.PostToFacebook);
     }
     if (constant.IsEqualTo(UIActivityTypePostToTwitter))
     {
         return(PSPDFActivityType.PostToTwitter);
     }
     if (constant.IsEqualTo(UIActivityTypePostToWeibo))
     {
         return(PSPDFActivityType.PostToWeibo);
     }
     if (constant.IsEqualTo(UIActivityTypeMessage))
     {
         return(PSPDFActivityType.Message);
     }
     if (constant.IsEqualTo(UIActivityTypeMail))
     {
         return(PSPDFActivityType.Mail);
     }
     if (constant.IsEqualTo(UIActivityTypePrint))
     {
         return(PSPDFActivityType.Print);
     }
     if (constant.IsEqualTo(UIActivityTypeCopyToPasteboard))
     {
         return(PSPDFActivityType.CopyToPasteboard);
     }
     if (constant.IsEqualTo(UIActivityTypeAssignToContact))
     {
         return(PSPDFActivityType.AssignToContact);
     }
     if (constant.IsEqualTo(UIActivityTypeSaveToCameraRoll))
     {
         return(PSPDFActivityType.SaveToCameraRoll);
     }
     if (constant.IsEqualTo(UIActivityTypeAddToReadingList))
     {
         return(PSPDFActivityType.AddToReadingList);
     }
     if (constant.IsEqualTo(UIActivityTypePostToFlickr))
     {
         return(PSPDFActivityType.PostToFlickr);
     }
     if (constant.IsEqualTo(UIActivityTypePostToVimeo))
     {
         return(PSPDFActivityType.PostToVimeo);
     }
     if (constant.IsEqualTo(UIActivityTypePostToTencentWeibo))
     {
         return(PSPDFActivityType.PostToTencentWeibo);
     }
     if (constant.IsEqualTo(UIActivityTypeAirDrop))
     {
         return(PSPDFActivityType.AirDrop);
     }
     if (constant.IsEqualTo(UIActivityTypeOpenInIBooks))
     {
         return(PSPDFActivityType.OpenInIBooks);
     }
     if (constant.IsEqualTo(UIActivityTypeMarkupAsPDF))
     {
         return(PSPDFActivityType.MarkupAsPdf);
     }
     return(PSPDFActivityType.Null);
 }