diff --git a/websocket-sharp/Server/WebSocketServiceManager.cs b/websocket-sharp/Server/WebSocketServiceManager.cs
index 4f1469f3..d3f63691 100644
--- a/websocket-sharp/Server/WebSocketServiceManager.cs
+++ b/websocket-sharp/Server/WebSocketServiceManager.cs
@@ -105,13 +105,39 @@ namespace WebSocketSharp.Server
     /// <summary>
     /// Gets the WebSocket service host with the specified <paramref name="path"/>.
     /// </summary>
+    /// <remarks>
+    /// <paramref name="path"/> is converted to a URL-decoded string and
+    /// / is trimmed from the end of the converted string if any.
+    /// </remarks>
     /// <value>
     /// A <see cref="WebSocketServiceHost"/> instance that provides the access to
-    /// the information in the service, or <see langword="null"/> if it's not found.
+    /// the information in the service or <see langword="null"/> if not found.
     /// </value>
     /// <param name="path">
-    /// A <see cref="string"/> that represents the absolute path to the service to find.
+    /// A <see cref="string"/> that represents an absolute path to
+    /// the service to find.
     /// </param>
+    /// <exception cref="ArgumentNullException">
+    /// <paramref name="path"/> is <see langword="null"/>.
+    /// </exception>
+    /// <exception cref="ArgumentException">
+    ///   <para>
+    ///   <paramref name="path"/> is empty.
+    ///   </para>
+    ///   <para>
+    ///   -or-
+    ///   </para>
+    ///   <para>
+    ///   <paramref name="path"/> is not an absolute path.
+    ///   </para>
+    ///   <para>
+    ///   -or-
+    ///   </para>
+    ///   <para>
+    ///   <paramref name="path"/> includes either or both
+    ///   query and fragment components.
+    ///   </para>
+    /// </exception>
     public WebSocketServiceHost this[string path] {
       get {
         if (path == null)