From 1b2ea363a907fa3d4a2e58054016314b1be58c82 Mon Sep 17 00:00:00 2001
From: "610262374@qq.com" <610262374@qq.com>
Date: Sat, 24 Nov 2018 01:59:34 +0800
Subject: [PATCH] https://github.com/sunkaixuan/SqlSugar/issues/149

---
 Src/Asp.Net/SqlSugar/Abstract/AdoProvider/AdoProvider.cs | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/Src/Asp.Net/SqlSugar/Abstract/AdoProvider/AdoProvider.cs b/Src/Asp.Net/SqlSugar/Abstract/AdoProvider/AdoProvider.cs
index 6451ebc8a..3066e6956 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/AdoProvider/AdoProvider.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/AdoProvider/AdoProvider.cs
@@ -110,11 +110,14 @@ namespace SqlSugar
 
             if (this.IsMasterSlaveSeparation)
             {
-                foreach (var slaveConnection in this.SlaveConnections)
+                if (this.SlaveConnections != null)
                 {
-                    if (slaveConnection != null && slaveConnection.State == ConnectionState.Open)
+                    foreach (var slaveConnection in this.SlaveConnections)
                     {
-                        slaveConnection.Dispose();
+                        if (slaveConnection != null && slaveConnection.State == ConnectionState.Open)
+                        {
+                            slaveConnection.Dispose();
+                        }
                     }
                 }
             }