ADO.Net实体数据模型添加DB-First/Code First报错

Authentication method 'caching_sha2_password' not supported by any of the available plugins.

解决办法：

1、输入命令 mysql -u root -p 连接mysql

C:\mysql-8.0.19-winx64\bin>mysql -u root -p
Enter password: ***********
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 9
Server version: 8.0.19 MySQL Community Server - GPL

Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
2、输入以下命令 更改密码验证方式
mysql> alter user 'root'@'localhost' identified with mysql_native_password by '数据库密码';
Query OK, 0 rows affected (0.10 sec)

3、打开mysql安装目录下的 my.ini，在[mysqld]下面添加代码：

default_authentication_plugin=mysql_native_password

------------------------my.ini-------------------------------

[Client]
port = 3306
default-character-set=utf8
[mysqld]
port = 3306
basedir=C:\mysql-8.0.19-winx64
datadir=C:\mysql-8.0.19-winx64\data
max_connections=200
character-set-server=utf8
default-storage-engine=INNODB
default_authentication_plugin=mysql_native_password
[mysql]
default-character-set=utf8

-------------------------------------------------------

4、重启mysql服务

C:\mysql-8.0.19-winx64\bin>net stop mysql
mysql 服务正在停止.
mysql 服务已成功停止。

C:\mysql-8.0.19-winx64\bin>net start mysql
mysql 服务正在启动 ..
mysql 服务已经启动成功。