diff --git a/FreeSql/FreeSqlBuilder.cs b/FreeSql/FreeSqlBuilder.cs
index 6c8be1d6..892ab719 100644
--- a/FreeSql/FreeSqlBuilder.cs
+++ b/FreeSql/FreeSqlBuilder.cs
@@ -173,12 +173,12 @@ namespace FreeSql
             var type = _providerType;
             if (type != null)
             {
-			    if (type.IsGenericTypeDefinition)
-			        type = type.MakeGenericType(typeof(TMark));
-			}
-			else
+                if (type.IsGenericTypeDefinition)
+                    type = type.MakeGenericType(typeof(TMark));
+            }
+            else
 			{
-				Action<string, string> throwNotFind = (dll, providerType) => throw new Exception($"缺少 FreeSql 数据库实现包：{dll}，可前往 nuget 下载；如果存在 {dll} 依然报错（原因是环境问题导致反射不到类型），请在 UseConnectionString/UseConnectionFactory 第三个参数手工传入 typeof({providerType})");
+                Action<string, string> throwNotFind = (dll, providerType) => throw new Exception($"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: