diff --git a/websocket-sharp/WebSocket.cs b/websocket-sharp/WebSocket.cs
index 7ec75de3..e1f3e58b 100644
--- a/websocket-sharp/WebSocket.cs
+++ b/websocket-sharp/WebSocket.cs
@@ -2892,6 +2892,29 @@ namespace WebSocketSharp
     /// the send is complete. A <see cref="bool"/> passed to this delegate will be
     /// <c>true</c> if the send has done with no error.
     /// </param>
+    /// <exception cref="InvalidOperationException">
+    /// The current state of the connection is not Open.
+    /// </exception>
+    /// <exception cref="ArgumentNullException">
+    /// <paramref name="stream"/> is <see langword="null"/>.
+    /// </exception>
+    /// <exception cref="ArgumentException">
+    ///   <para>
+    ///   <paramref name="stream"/> cannot be read.
+    ///   </para>
+    ///   <para>
+    ///   -or-
+    ///   </para>
+    ///   <para>
+    ///   <paramref name="length"/> is less than 1.
+    ///   </para>
+    ///   <para>
+    ///   -or-
+    ///   </para>
+    ///   <para>
+    ///   No data could be read from <paramref name="stream"/>.
+    ///   </para>
+    /// </exception>
     public void SendAsync (Stream stream, int length, Action<bool> completed)
     {
       if (_readyState != WebSocketState.Open) {