Update JsonExtensionDataAttribute.xml

Author: Ron Petrusha

xml/System.Text.Json.Serialization/JsonExtensionDataAttribute.xml

@@ -19,18 +19,18 @@
     </Attribute>
   </Attributes>
   <Docs>
-    <summary>When placed on a property of type <see cref="T:System.Collections.Generic.IDictionary`2" />, any properties that do not have a matching member are added to that Dictionary during deserialization and written during serialization.</summary>
+    <summary>When placed on a property of type <see cref="T:System.Collections.Generic.IDictionary`2" />, provides that any properties that do not have a matching member are added to that dictionary during deserialization and written during serialization.</summary>
     <remarks>
       <format type="text/markdown">
             <![CDATA[
 
 ## Remarks
 
-The TKey value must be <xref:System.String> and TValue must be <xref:System.Text.Json.JsonElement> or <xref:System.Object>.
+The dictionary's `TKey` value must be <xref:System.String>, and `TValue` must be <xref:System.Text.Json.JsonElement> or <xref:System.Object>.
 
-During deserializing, when using <xref:System.Object> a "null" JSON value is treated as a `null` object reference, and when using <xref:System.Text.Json.JsonElement> a "null" is treated as a JsonElement with <xref:System.Text.Json.JsonElement.ValueKind> set to <xref:System.Text.Json.JsonValueKind.Null>.
+During deserialization, when using <xref:System.Object>, a "null" JSON value is treated as a `null` object reference, and when using <xref:System.Text.Json.JsonElement>, a "null" is treated as a JsonElement with <xref:System.Text.Json.JsonElement.ValueKind> set to <xref:System.Text.Json.JsonValueKind.Null?displayProperty=nameWithType>.
             
-During serializing, the name of the extension data property is not included in the JSON; the data contained within the extension data is serialized as properties of the JSON object.
+During serialization, the name of the extension data property is not included in the JSON; the data contained within the extension data is serialized as properties of the JSON object.
             
 If there is more than one extension property on a type, or it the property is not of the correct type, an <xref:System.InvalidOperationException> is thrown during the first serialization or deserialization of that type.
 
@@ -51,10 +51,10 @@ If there is more than one extension property on a type, or it the property is no
         <AssemblyVersion>4.0.0.0</AssemblyVersion>
       </AssemblyInfo>
       <Parameters />
-      <Docs>
-        <summary>To be added.</summary>
+      <Docsd
+        <summary>Instantiates a new instance of the <see cref="T:System.Text.Json.Serialization.JSonExtensionDataAttribute" /> class.</summary>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
   </Members>
-</Type>
+</Type>