Merge pull request 'change' (#1) from dev into master

Reviewed-on: #1

SlnMesnac.Business/base/BaseBusiness.cs

@@ -239,11 +239,6 @@ namespace SlnMesnac.Business.@base
             try
             {
 
-                if(baseConfigInfos == null)
-                {
-                    return "M100";
-                }
-
                 if (baseConfigInfos.Count == 0)
                 {
                     throw new ArgumentNullException("根据Key获取PLC地址异常:配置集合为空");