ปรับ api เข้ากับ โครงสร้างใหม่

Extensions/StreamExtension.cs

@@ -0,0 +1,29 @@
+using System;
+using System.IO;
+
+namespace BMA.EHR.Recurit.Exam.Service.Extensions
+{
+    public static class StreamExtension
+    {
+        #region  " Methods "
+
+        #region " Public "
+
+        public static string ToBase64(this MemoryStream stream)
+        {
+            stream.Seek(0, SeekOrigin.Begin);
+            byte[] bytes;
+            using (var memoryStream = new MemoryStream())
+            {
+                stream.CopyTo(memoryStream);
+                bytes = memoryStream.ToArray();
+            }
+
+            return Convert.ToBase64String(bytes);
+        }
+
+        #endregion
+
+        #endregion
+    }
+}