Add undocumented docs for Quic and Http

xml/System.Net.Http/HttpContent.xml

@@ -794,10 +794,15 @@ When the `disposing` parameter is `true`, this method releases all resources hel
         <Parameter Name="cancellationToken" Type="System.Threading.CancellationToken" Index="0" FrameworkAlternate="net-9.0" />
       </Parameters>
       <Docs>
-        <param name="cancellationToken">To be added.</param>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
-        <remarks>To be added.</remarks>
+        <param name="cancellationToken">The cancellation token to cancel the operation.</param>
+        <summary>Serialize the HTTP content to a memory buffer as an asynchronous operation.</summary>
+        <returns>The task object representing the asynchronous operation.</returns>
+        <remarks>
+          <para>This operation will not block. The returned <see cref="T:System.Threading.Tasks.Task" /> object will complete after all of the content has been serialized to the memory buffer.</para>
+          <para>After content is serialized to a memory buffer, calls to one of the <see cref="M:System.Net.Http.HttpContent.CopyToAsync(System.IO.Stream)" /> methods will copy the content of the memory buffer to the target stream.</para>
+        </remarks>
+        <exception cref="T:System.OperationCanceledException">The cancellation token was canceled. This exception is stored into the returned task.</exception>
+        <exception cref="T:System.ObjectDisposedException">The object has already been disposed.</exception>
       </Docs>
     </Member>
     <Member MemberName="LoadIntoBufferAsync">
@@ -823,11 +828,16 @@ When the `disposing` parameter is `true`, this method releases all resources hel
         <Parameter Name="cancellationToken" Type="System.Threading.CancellationToken" Index="1" FrameworkAlternate="net-9.0" />
       </Parameters>
       <Docs>
-        <param name="maxBufferSize">To be added.</param>
-        <param name="cancellationToken">To be added.</param>
-        <summary>To be added.</summary>
-        <returns>To be added.</returns>
-        <remarks>To be added.</remarks>
+        <param name="maxBufferSize">The maximum size, in bytes, of the buffer to use.</param>
+        <param name="cancellationToken">The cancellation token to cancel the operation.</param>
+        <summary>Serialize the HTTP content to a memory buffer as an asynchronous operation.</summary>
+        <returns>The task object representing the asynchronous operation.</returns>
+        <remarks>
+          <para>This operation will not block. The returned <see cref="T:System.Threading.Tasks.Task" /> object will complete after all of the content has been serialized to the memory buffer.</para>
+          <para>After content is serialized to a memory buffer, calls to one of the <see cref="M:System.Net.Http.HttpContent.CopyToAsync(System.IO.Stream)" /> methods will copy the content of the memory buffer to the target stream.</para>
+        </remarks>
+        <exception cref="T:System.OperationCanceledException">The cancellation token was canceled. This exception is stored into the returned task.</exception>
+        <exception cref="T:System.ObjectDisposedException">The object has already been disposed.</exception>
       </Docs>
     </Member>
     <Member MemberName="ReadAsByteArrayAsync">

xml/System.Net.Http/SocketsHttpHandler.xml

@@ -451,9 +451,9 @@ The default proxy is used only when <xref:System.Net.Http.SocketsHttpHandler.Use
         <ReturnType>System.Boolean</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
+        <summary>Gets or sets a value that indicates whether additional HTTP/3 connections can be established to the same server.</summary>
         <value>To be added.</value>
-        <remarks>To be added.</remarks>
+        <remarks>Enabling multiple connections to the same server explicitly goes against <see href="https://www.rfc-editor.org/rfc/rfc9114.html#section-3.3-4">RFC 9114 - HTTP/3</see>.</remarks>
       </Docs>
     </Member>
     <Member MemberName="Expect100ContinueTimeout">

xml/System.Net.Quic/QuicConnectionOptions.xml

@@ -241,7 +241,11 @@ To use a different close error code, call <xref:System.Net.Quic.QuicConnection.C
         <ReturnType>System.Action&lt;System.Net.Quic.QuicConnection,System.Net.Quic.QuicStreamCapacityChangedArgs&gt;</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
+        <summary>
+          <para>Optional callback that is invoked when new stream limit is released by the peer. Corresponds to receiving a MAX_STREAMS frame.</para>
+          <para>The callback values represent increments of stream limits, e.g.: current limit is 10 bidirectional streams, callback arguments notify 5 more additional bidirectional streams =&gt; 15 bidirectional streams can be opened in total at the moment.</para>
+          <para>The initial capacity is reported with the first invocation of the callback that might happen before the <see cref="T:System.Net.Quic.QuicConnection" /> instance is handed out via either <see cref="M:System.Net.Quic.QuicConnection.ConnectAsync(System.Net.Quic.QuicClientConnectionOptions,System.Threading.CancellationToken)" /> or <see cref="M:System.Net.Quic.QuicListener.AcceptConnectionAsync(System.Threading.CancellationToken)" />.</para>
+        </summary>
         <value>To be added.</value>
         <remarks>To be added.</remarks>
       </Docs>

xml/System.Net.Quic/QuicStream.xml

@@ -28,10 +28,10 @@
   <Docs>
     <summary>Represents a QUIC stream. <see cref="T:System.Net.Quic.QuicStream" /> can be <see cref="F:System.Net.Quic.QuicStreamType.Unidirectional">unidirectional</see>, that is, write-only for the opening side, or <see cref="F:System.Net.Quic.QuicStreamType.Bidirectional">bidirectional</see>, which allows both sides to write.</summary>
     <remarks>
-      <see cref="T:System.Net.Quic.QuicStream" /> can be used in a same way as any other <see cref="T:System.IO.Stream" />.
-
-Apart from a stream API, <see cref="T:System.Net.Quic.QuicStream" /> also exposes QUIC-specific features:
-
+      <see cref="T:System.Net.Quic.QuicStream" /> can be used in a same way as any other <see cref="T:System.IO.Stream" />.
+
+Apart from a stream API, <see cref="T:System.Net.Quic.QuicStream" /> also exposes QUIC-specific features:
+
 <list type="bullet"><item><term><see cref="M:System.Net.Quic.QuicStream.WriteAsync(System.ReadOnlyMemory{System.Byte},System.Boolean,System.Threading.CancellationToken)" /></term><description>Closes the writing side of the stream as a single operation with the write itself.</description></item><item><term><see cref="M:System.Net.Quic.QuicStream.CompleteWrites" /></term><description>Closes the writing side of the stream.</description></item><item><term><see cref="M:System.Net.Quic.QuicStream.Abort(System.Net.Quic.QuicAbortDirection,System.Int64)" /></term><description>Aborts either the writing or the reading side of the stream.</description></item><item><term><see cref="M:System.Net.Quic.QuicStream.WritesClosed" /></term><description>Returns a <see cref="T:System.Threading.Tasks.Task" /> that will complete when the stream writing side has been closed (gracefully or abortively).</description></item><item><term><see cref="P:System.Net.Quic.QuicStream.ReadsClosed" /></term><description>Returns a <see cref="T:System.Threading.Tasks.Task" /> that will complete when the stream reading side has been closed (gracefully or abortively).</description></item></list></remarks>
     <related type="Article" href="https://www.rfc-editor.org/rfc/rfc9000.html#name-streams">RFC 9000: Streams</related>
   </Docs>
@@ -62,12 +62,12 @@ Apart from a stream API, <see cref="T:System.Net.Quic.QuicStream" /> also expose
         <param name="errorCode">The error code with which to abort the stream. This value is application-protocol (which is the layer above QUIC) dependent.</param>
         <summary>Aborts either the <see cref="F:System.Net.Quic.QuicAbortDirection.Read">reading</see>, <see cref="F:System.Net.Quic.QuicAbortDirection.Write">writing</see>, or <see cref="F:System.Net.Quic.QuicAbortDirection.Both">both</see> sides of the stream.</summary>
         <remarks>
-          <format type="text/markdown"><![CDATA[
-
-## Remarks
-
-Corresponds to [STOP_SENDING](https://www.rfc-editor.org/rfc/rfc9000.html#frame-stop-sending) and [RESET_STREAM](https://www.rfc-editor.org/rfc/rfc9000.html#frame-reset-stream) QUIC frames.
-
+          <format type="text/markdown"><![CDATA[
+
+## Remarks
+
+Corresponds to [STOP_SENDING](https://www.rfc-editor.org/rfc/rfc9000.html#frame-stop-sending) and [RESET_STREAM](https://www.rfc-editor.org/rfc/rfc9000.html#frame-reset-stream) QUIC frames.
+
           ]]></format>
         </remarks>
       </Docs>
@@ -293,14 +293,14 @@ Corresponds to [STOP_SENDING](https://www.rfc-editor.org/rfc/rfc9000.html#frame-
       <Docs>
         <summary>Gracefully completes the writing side of the stream.</summary>
         <remarks>
-          <format type="text/markdown"><![CDATA[
-
-## Remarks
-
-Corresponds to an empty [STREAM](https://www.rfc-editor.org/rfc/rfc9000.html#frame-stream) frame with `FIN` flag set to `true`.
-
-Equivalent to using <xref:System.Net.Quic.QuicStream.WriteAsync(System.ReadOnlyMemory{System.Byte},System.Boolean,System.Threading.CancellationToken)> with `completeWrites: true`.
-
+          <format type="text/markdown"><![CDATA[
+
+## Remarks
+
+Corresponds to an empty [STREAM](https://www.rfc-editor.org/rfc/rfc9000.html#frame-stream) frame with `FIN` flag set to `true`.
+
+Equivalent to using <xref:System.Net.Quic.QuicStream.WriteAsync(System.ReadOnlyMemory{System.Byte},System.Boolean,System.Threading.CancellationToken)> with `completeWrites: true`.
+
           ]]></format>
         </remarks>
       </Docs>

xml/System.Net.Quic/QuicStreamCapacityChangedArgs.xml

@@ -20,7 +20,7 @@
     </Attribute>
   </Attributes>
   <Docs>
-    <summary>To be added.</summary>
+    <summary>Arguments for <see cref="P:System.Net.Quic.QuicConnectionOptions.StreamCapacityCallback" />.</summary>
     <remarks>To be added.</remarks>
   </Docs>
   <Members>
@@ -40,7 +40,7 @@
         <ReturnType>System.Int32</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
+        <summary>The increment saying how many additional bidirectional streams can be opened on the connection, increased via the latest MAX_STREAMS frame.</summary>
         <value>To be added.</value>
         <remarks>To be added.</remarks>
       </Docs>
@@ -61,7 +61,7 @@
         <ReturnType>System.Int32</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>To be added.</summary>
+        <summary>The increment saying how many additional unidirectional streams can be opened on the connection, increased via the latest MAX_STREAMS frame.</summary>
         <value>To be added.</value>
         <remarks>To be added.</remarks>
       </Docs>