refactor(Pdf); rename OutputStream as ExportStream

- rename ToBytes extension method as ExportAsBytes

EnvelopeGenerator.PdfEditor/Extensions.cs

@@ -12,6 +12,6 @@ namespace EnvelopeGenerator.PdfEditor
         /// <typeparam name="TPdf"></typeparam>
         /// <param name="pdf"></param>
         /// <returns>A new byte array</returns>
-        public static byte[] ToBytes<TPdf>(this TPdf pdf) where TPdf : Pdf<MemoryStream, MemoryStream> => pdf.OutputStream.ToArray();
+        public static byte[] ExportAsBytes<TPdf>(this TPdf pdf) where TPdf : Pdf<MemoryStream, MemoryStream> => pdf.ExportStream().ToArray();
     }
 }

EnvelopeGenerator.PdfEditor/Pdf.cs

@@ -47,14 +47,11 @@ namespace EnvelopeGenerator.PdfEditor
         /// <returns>
         /// The <typeparamref name="TOutputStream"/> instance that contains the updated PDF bytes.
         /// </returns>
-        public TOutputStream OutputStream
-        {
-            get
+        public TOutputStream ExportStream()
         {
             _doc.Close();
             return _outputStream;
         }
-        }
 
         #region Edit methods
         public Pdf<TInputStream, TOutputStream> Document(Action<PdfDocument> edit)

EnvelopeGenerator.Web/Controllers/EnvelopeController.cs

@@ -234,7 +234,7 @@ public class EnvelopeController : ViewControllerBase
                 canvas.FillStroke();
             });
 
-            doc.ByteData = pdf.ToBytes();
+            doc.ByteData = pdf.ExportAsBytes();
 
             ViewData["DocumentBytes"] = doc.ByteData;
         }