入门C#遇到的问题请教

Question

using System;
using System.Collection.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace 飞机大战
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internal class BackGround:Gamebot
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错误列表
"BackGround"不实现继承的抽象成员"Gamebot.Draw(Graphics)"
未提供与"Gamebot.Gamebot(int,此处省略四个int,int,Direction)"的所需参数"x"对应的参数

Answer 1

public override T Draw();