C# Im having a issue with some of my coding C#

[UniTheVerse]

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 UH
{
    public partial class Form1 : Form
    {

        ExploitAPI module = new ExploitAPI();
        public Form1()
        {
            InitializeComponent();
        }
        Point lastPoint;
        private void Form1_Load(object sender, EventArgs e)
        {
            listBox1.Items.Clear();//Clear Items in the LuaScriptList
            Functions.PopulateListBox(listBox1, "./Scripts", "*.txt");
            Functions.PopulateListBox(listBox1, "./Scripts", "*.lua");
        }

        private void button9_Click(object sender, EventArgs e)
        {
            Options openform = new Options();
            openform.Show();

        }

        private void button10_Click(object sender, EventArgs e)
        {
            listBox1.Items.Clear();//Clear Items in the LuaScriptList
            Functions.PopulateListBox(listBox1, "./Scripts", "*.txt");
            Functions.PopulateListBox(listBox1, "./Scripts", "*.lua");
        }

        private void button1_Click(object sender, EventArgs e)
        {
            module.SendLuaScript(fastColoredTextBox1.Text);
        }

        private void button3_Click(object sender, EventArgs e)
        {

            module.LaunchExploit();

        }

        private void button2_Click(object sender, EventArgs e)
        {
            fastColoredTextBox1.Clear();
        }

        private void button4_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 button5_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 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 button6_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        private void button7_Click(object sender, EventArgs e)
        {
            WindowState = FormWindowState.Minimized;
        }

        private void button8_Click(object sender, EventArgs e)
        {
            ScriptHub openform = new ScriptHub();
            openform.Show();

        }

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

        private void button3_Click_1(object sender, EventArgs e)
        {
            module.LaunchExploit();    Here is where it gives the error
        }
    }
}

When I run my code and press one of the main buttons of the application I'm making it gives me System.Net.WebExecption: The underlying connection was closed: An unexpected error has occurred to send here's the code

 

[codergirl]

The error is occuring in "module", so you must check the ExploitAPI class and debug the code in LaunchExploit()
Somewhere there is a System.Net.WebExecption thrown. The code you show here is not the source of the exception according to me

 

[Deleted member 2829]

I agree with @codergirl that your source code is probably not the cause of the exception, and that it seems an issue with the ExploitAPI. Have you tried asking in the WeAreDevs forums ?