apache doris 兼容mysql协议；所以我们在.netcore项目中，可以使用Mysql的驱动

dotnet add package MySqlConnector

测试代码：

 [HttpGet]
        public async Task<string>  Get2()
        {
            //打开连接
            await using var connection = new MySqlConnection("Server=192.168.122.136;Port=9030;User ID=root;Password=admin123;Database=demo");
            await connection.OpenAsync();


            //添加数据
            using (MySqlCommand cmd = new MySqlCommand())
            {
                cmd.Connection = connection;
                cmd.CommandText = "insert into example_tbl VALUES(10006,'2021-4-10', '北京',36,0,'2023-3-10',200,40,6)";
                // cmd.Parameters.AddWithValue("p", "Hello world");
                int ret = await  cmd.ExecuteNonQueryAsync();
                Console.WriteLine($"ret={ret}");
            }

            //查询
            using var command = new MySqlCommand("SELECT *  FROM example_tbl;", connection);
            using var reader =await  command.ExecuteReaderAsync();
            while ( await  reader.ReadAsync())
            {
                Console.WriteLine($"user_id={reader.GetString(0)},city={reader.GetString(2)}");
               
            }
              
            return "ok";
        }

官方的地址：https://mysqlconnector.net/tutorials/basic-api/

连接字符串的说明：https://mysqlconnector.net/connection-options/

也可以整合Dapper,请看官网：Tutorial: Connect to MySQL with Dapper using C# - MySqlConnector

EFCore测试了下，没成功。