diff --git a/FreeSql/FreeSqlBuilder.cs b/FreeSql/FreeSqlBuilder.cs
index 892ab719..344e2a2c 100644
--- a/FreeSql/FreeSqlBuilder.cs
+++ b/FreeSql/FreeSqlBuilder.cs
@@ -177,7 +177,7 @@ namespace FreeSql
                     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)
                 {