Automatically port System.Text.Json.JsonEncodedText (dotnet#3012)

* Automatically port System.Text.Json.JsonEncodedText

* Some edits.

Author: carlossanlop

xml/System.Text.Json/JsonEncodedText.xml

@@ -54,11 +54,16 @@ This type can be used to cache and store known strings used for writing JSON ahe
         <Parameter Name="encoder" Type="System.Text.Encodings.Web.JavaScriptEncoder" />
       </Parameters>
       <Docs>
-        <param name="utf8Value">To be added.</param>
-        <param name="encoder">To be added.</param>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <param name="utf8Value">The UTF-8 encoded text to convert to JSON encoded text.</param>
+        <param name="encoder">The encoder to use when escaping the string, or <see langword="null" /> to use the default encoder.</param>
+        <summary>Encodes a UTF-8 text value as a JSON string.</summary>
+        <returns>The encoded JSON text.</returns>
         <remarks>To be added.</remarks>
+        <exception cref="T:System.ArgumentException"><paramref name="utf8Value" /> is too large.
+
+-or-
+
+<paramref name="utf8Value" /> contains invalid UTF-8 bytes.</exception>
       </Docs>
     </Member>
     <Member MemberName="Encode">
@@ -80,11 +85,16 @@ This type can be used to cache and store known strings used for writing JSON ahe
         <Parameter Name="encoder" Type="System.Text.Encodings.Web.JavaScriptEncoder" />
       </Parameters>
       <Docs>
-        <param name="value">To be added.</param>
-        <param name="encoder">To be added.</param>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <param name="value">The value to convert to JSON encoded text.</param>
+        <param name="encoder">The encoder to use when escaping the string, or <see langword="null" /> to use the default encoder.</param>
+        <summary>Encodes a specified text value as a JSON string.</summary>
+        <returns>The encoded JSON text.</returns>
         <remarks>To be added.</remarks>
+        <exception cref="T:System.ArgumentException"><paramref name="value" /> is too large.
+
+-or-
+
+<paramref name="value" /> contains invalid UTF-16 characters.</exception>
       </Docs>
     </Member>
     <Member MemberName="Encode">
@@ -106,11 +116,17 @@ This type can be used to cache and store known strings used for writing JSON ahe
         <Parameter Name="encoder" Type="System.Text.Encodings.Web.JavaScriptEncoder" />
       </Parameters>
       <Docs>
-        <param name="value">To be added.</param>
-        <param name="encoder">To be added.</param>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
+        <param name="value">The value to convert to JSON encoded text.</param>
+        <param name="encoder">The encoder to use when escaping the string, or <see langword="null" /> to use the default encoder.</param>
+        <summary>Encodes the string text value as a JSON string.</summary>
+        <returns>The encoded JSON text.</returns>
         <remarks>To be added.</remarks>
+        <exception cref="T:System.ArgumentNullException"><paramref name="value" /> is <see langword="null" />.</exception>
+        <exception cref="T:System.ArgumentException"><paramref name="value" /> is too large.
+
+-or-
+
+<paramref name="value" /> contains invalid UTF-16 characters.</exception>
       </Docs>
     </Member>
     <Member MemberName="EncodedUtf8Bytes">