diff --git a/websocket-sharp/Server/WebSocketServiceHost.cs b/websocket-sharp/Server/WebSocketServiceHost.cs
index e3376bbf..1da76427 100644
--- a/websocket-sharp/Server/WebSocketServiceHost.cs
+++ b/websocket-sharp/Server/WebSocketServiceHost.cs
@@ -189,28 +189,6 @@ namespace WebSocketSharp.Server
 
     #endregion
 
-    #region Private Methods
-
-    private bool canSet (out string message)
-    {
-      message = null;
-
-      var state = _sessions.State;
-      if (state == ServerState.Start) {
-        message = "The service has already started.";
-        return false;
-      }
-
-      if (state == ServerState.ShuttingDown) {
-        message = "The service is shutting down.";
-        return false;
-      }
-
-      return true;
-    }
-
-    #endregion
-
     #region Internal Methods
 
     internal void Start ()