C#开发Executor遇两类错误：api未定义、命名空间成员违规

错误原因及修复方案： #

• 错误1：命名空间不能直接包含字段、方法或语句这类成员
  你将ExploitAPI api = new ExploitAPI();直接定义在了命名空间ZynTap_Executor下，C#中命名空间仅允许包含类、接口、枚举等类型成员，不能直接放置字段实例化代码。

• 错误2：当前上下文中不存在名称‘api’
  原代码中api的定义不在Form1类的作用域内，导致类内的按钮点击方法无法访问这个变量。

修正后的完整代码： #

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using WeAreDevs_API;

namespace ZynTap_Executor
{
    public partial class Form1 : Form
    {
        // 将api实例移到Form1类内部作为字段
        ExploitAPI api = new ExploitAPI();

        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Environment.Exit(0);
        }
        Point lastPoint;
        private void panel1_MouseDown(object sender, MouseEventArgs e)
        {
            lastPoint = new Point(e.X, e.Y);
        }

        private void panel1_MouseMove(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                this.Left += e.X - lastPoint.X;
                this.Top += e.Y - lastPoint.Y;
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            WindowState = FormWindowState.Minimized;
        }

        private void button4_Click(object sender, EventArgs e)
        {
            fastColoredTextBox1.Clear();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void button3_Click(object sender, EventArgs e)
        {
            api.SendLuaScript(fastColoredTextBox1.Text);
        }

        private void button8_Click(object sender, EventArgs e)
        {
            api.LaunchExploit();
        }

        private void button5_Click(object sender, EventArgs e)
        {
            OpenFileDialog openFileDialog1 = new OpenFileDialog();
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                openFileDialog1.Title = "Open";
                fastColoredTextBox1.Text = File.ReadAllText(openFileDialog1.FileName);
            }
        }

        private void button6_Click(object sender, EventArgs e)
        {
            SaveFileDialog saveFileDialog1 = new SaveFileDialog();
            if (saveFileDialog1.ShowDialog() == DialogResult.OK)
            {
                using (Stream s = File.Open(saveFileDialog1.FileName, FileMode.CreateNew))
                using (StreamWriter sw = new StreamWriter(s))
                {
                    sw.Write(fastColoredTextBox1.Text);
                }
            }
        }

        private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            fastColoredTextBox1.Text = File.ReadAllText($"./Scripts/{listBox1.SelectedItem}");
        }

        private void button7_Click(object sender, EventArgs e)
        {
            listBox1.Items.Clear();//Clear Items in the LuaScriptList
            Functions.PopulateListBox(listBox1, "./Scripts", "*.txt");
            Functions.PopulateListBox(listBox1, "./Scripts", "*.lua");
        }
    }
}

内容的提问来源于stack exchange，提问作者WoidZ