iTextSharp.text.pdf.PdfObject.IsNull C# (CSharp) Method

        public bool IsNull() {
            return (this.type == NULL);
        }
    

 internal void AddDefaultColor(PdfName name, PdfObject obj)
 {
     if (obj == null || obj.IsNull())
     {
         colorDictionary.Remove(name);
     }
     else
     {
         colorDictionary.Put(name, obj);
     }
 }