[C#] Advance exploit code

// Execute Button

api.Execute(fastColoredTextBox1.Text);

// Clear Button

fastColoredTextBox1.Clear();

// Open Fiel Button

OpenFileDialog ofd = new OpenFileDialog();
            ofd.Filter = "Txt Files (*.txt)|*.txt|Lua Files (*.lua)|*.lua";

            if (ofd.ShowDialog() == DialogResult.OK)
            {
                fastColoredTextBox1.Text = File.ReadAllText(ofd.FileName);
            }

// Execute File Button

OpenFileDialog ef = new OpenFileDialog();
            ef.Filter = "Txt Files (*.txt)|*.txt|Lua Files (*.lua)|*.lua";

            if (ef.ShowDialog() == DialogResult.OK)
            {
                api.Execute(ef.FileName);
            }

// Save File Button

SaveFileDialog sfd = new SaveFileDialog();
            sfd.Filter = "Txt Files (*.txt)|*.txt|Lua Files (*.lua)|*.lua";

            if (sfd.ShowDialog() == DialogResult.OK)
            {
                Stream s = sfd.OpenFile();
                StreamWriter sw = new StreamWriter(s);
            }

// Attach button

api.Attach();

// Form load to load listbox scripts

DirectoryInfo di = new DirectoryInfo("./Scripts");
            FileInfo[] files = di.GetFiles("*.txt");
            foreach (FileInfo file in files)
            {
                listBox1.Items.Add(file.Name);
            }

            DirectoryInfo di1 = new DirectoryInfo("./Scripts");
            FileInfo[] files1 = di.GetFiles("*.lua");
            foreach (FileInfo file1 in files1)
            {
                listBox1.Items.Add(file1.Name);
            }

// Listbox selected items

if (listBox1.SelectedIndex != -1)
            {
                fastColoredTextBox1.Text = File.ReadAllText($"./Scripts/{listBox1.SelectedItem}");
            }