From b5cd2f6e1741af01b5b67382cb07fd2b8be93585 Mon Sep 17 00:00:00 2001
From: soukoku <yinchun.wang@gmail.com>
Date: Mon, 23 Mar 2015 07:20:06 -0400
Subject: [PATCH] Made IsOpen check current source.

---
 src/NTwain/DataSource.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/NTwain/DataSource.cs b/src/NTwain/DataSource.cs
index 7fe3ebb..8250f1f 100644
--- a/src/NTwain/DataSource.cs
+++ b/src/NTwain/DataSource.cs
@@ -157,7 +157,7 @@ namespace NTwain
         /// <value>
         ///   <c>true</c> if this data source is open; otherwise, <c>false</c>.
         /// </value>
-        public bool IsOpen { get { return _session.IsSourceOpen; } }
+        public bool IsOpen { get { return _session.IsSourceOpen && _session.CurrentSource == this; } }
 
         /// <summary>
         /// Gets or sets the current settings (CustomDSData) of this source if supported.