Microsoft.EntityFrameworkCore 代码配置数据库

public class PlatformDB : DbContext    {       
	public PlatformDB() : base()        {        }        
	protected override void OnModelCreating(ModelBuilder modelBuilder) {        }        
	protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)       
	{            
	    string conn="Data Source=.;UID=sa;PWD=123456;Initial Catalog=TestDB;Connection Timeout=120;Max Pool Size=250";
		//配置mariadb连接字符串            
		optionsBuilder.UseSqlServer(conn);     
	}    
}