From 212dfbbaed46dba4ceba12945e83ab7158917f0a Mon Sep 17 00:00:00 2001
From: Zero look <33046233+wch1618@users.noreply.github.com>
Date: Thu, 19 Aug 2021 11:39:00 +0800
Subject: [PATCH] =?UTF-8?q?=E5=8E=9F=E6=84=8F=E5=8F=AF=E8=83=BD=E6=98=AF?=
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---
 FreeSql/FreeSqlBuilder.cs | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/FreeSql/FreeSqlBuilder.cs b/FreeSql/FreeSqlBuilder.cs
index 2a15d347..6c8be1d6 100644
--- a/FreeSql/FreeSqlBuilder.cs
+++ b/FreeSql/FreeSqlBuilder.cs
@@ -171,10 +171,14 @@ namespace FreeSql
             if (string.IsNullOrEmpty(_masterConnectionString) && _connectionFactory == null) throw new Exception("参数 masterConnectionString 不可为空，请检查 UseConnectionString");
             IFreeSql<TMark> ret = null;
             var type = _providerType;
-            if (type?.IsGenericType == true) type = type.MakeGenericType(typeof(TMark));
-            if (type == null)
+            if (type != null)
             {
-                Action<string, string> throwNotFind = (dll, providerType) => throw new Exception($"缺少 FreeSql 数据库实现包：{dll}，可前往 nuget 下载；如果存在 {dll} 依然报错（原因是环境问题导致反射不到类型），请在 UseConnectionString/UseConnectionFactory 第三个参数手工传入 typeof({providerType})");
+			    if (type.IsGenericTypeDefinition)
+			        type = type.MakeGenericType(typeof(TMark));
+			}
+			else
+			{
+				Action<string, string> throwNotFind = (dll, providerType) => throw new Exception($"缺少 FreeSql 数据库实现包：{dll}，可前往 nuget 下载；如果存在 {dll} 依然报错（原因是环境问题导致反射不到类型），请在 UseConnectionString/UseConnectionFactory 第三个参数手工传入 typeof({providerType})");
                 switch (_dataType)
                 {
                     case DataType.MySql: