doh-csharp-4.bcl.md

@@ -14,6 +14,7 @@
     * [3-4. System.IO.BinaryWriter/Reader](#binarywriterreader)  
     * [3-5. System.Runtime.Serialization.Formatters.Binary.BinaryFomatter](#binaryformatter)  
     * [3-6. System.Xml.Serialization.XmlSerializer](#xmlserializer)  
+    * [3-7. System.Runtime.Serialization.Json.DataContractJsonSerializer](#datacontractjsonserializer)  
 
 
 -- -- --
@@ -529,4 +530,4 @@ class XmlSerializerEx
 }
 ```  
 
-
+### DataContractJsonSerializer