C#

using System;
using System.Windows.Forms;

namespace YOURNAMESPACE 
{
    public partial class AutoScrolledTbx : UserControl // contains a TextBox
    {
        public AutoScrolledTbx()
        {
            InitializeComponent();
        }

        // for use creating an instance in code at run-time
        public AutoScrolledTbx(string txt)
        {
            textBox1.Text = txt;

            this.textBox1.Select(this.textBox1.TextLength + 1, 0);
            this.textBox1.ScrollToCaret();
            this.textBox1.Capture = true;
            this.textBox1.Focus();
        }

        private void AutoScrolledTbx_Load(object sender, EventArgs e)
        {
            // Marc Gravell
            this.BeginInvoke((MethodInvoker)this.ForceScroll);
        }

        // adapted from Marc Gravell
        // https://stackoverflow.com/a/218740/133321
        private void ForceScroll()
        {
            // UI thread update
            this.Invoke(
                (MethodInvoker)delegate
                {
                    this.textBox1.Select(this.textBox1.TextLength + 1, 0);
                    this.textBox1.ScrollToCaret();
                    this.textBox1.Focus();
                    ActiveControl = this.textBox1;
                }
            );
        }
        // public method to add text
        public void AppendText(string txt)
        {
            this.textBox1.AppendText(txt);
        }
    }
}

var client = new HttpClient();

using (var content = new MultipartFormDataContent())
{
    content.Add(new StringContent("pswd"), "password");
    content.Add(new StringContent("usr"), "username");
    content.Add(new StreamContent(File.OpenRead("C:\\data_stats.txt"), "textfile");
    
    using (var response = await client.PostAsync("https://www.website.com", content))
    {
        response.EnsureSuccessStatusCode();
        string data = await response.Content.ReadAsStringAsync();
        ...
    }
}

private void Form1_Load(object sender, EventArgs e)
{
    textBox2.Text = "Initialising.....";
}

//Form1 frm1 = new Form1();
this.textBox1.Text += ThisText + System.Environment.NewLine;

Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
"If you just follow the bacon Eddy, wherever it leads you, then you won't have to think about politics." -- Some Bell.

ormonds wrote:

Form1 frm1 = new Form1();

Member 10474771 wrote:

It is about C# finally getting multiple inheritance, kind of like C++, albeit through interfaces
I am very excited for this.

Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
"If you just follow the bacon Eddy, wherever it leads you, then you won't have to think about politics." -- Some Bell.

Quote:

It means that a class doesn’t inherit members from the interfaces it implements

ormonds wrote:

You should write a book.