How to solve the CS1520 problem?

Question

C++ / C#

Hi, forum users!
I wanted to make the window appear in the corner of the screen at startup, but I ran into error CS1520 "The method must have a return type." I tried to find a solution on the Internet, but I did not find anything (maybe I was looking badly), so I wanted to ask you. I hope for your help)
code:

using System;
using System.Drawing;
using System.Windows.Forms;
class MyButtonClass : Form
{

    private TextBox FirstText, SecondText, ThirdText;


    private void InitializeComponent()
    {
        this.SuspendLayout();
        // 
        // MyButtonClass
        // 
        this.ClientSize = new System.Drawing.Size(284, 261);
        this.Name = "MyButtonClass";
        this.StartPosition = System.Windows.Forms.FormStartPosition.Manual;
        this.ResumeLayout(false);

    }

    int n, k, res, v;

    public MyButtonClass()
    {
        v = 0;

        this.Width = 296;
        this.Height = 525;

        FirstText = new TextBox();
        FirstText.Top = 10;
        FirstText.Left = 0;
        FirstText.Height = 50;
        FirstText.Width = 210;
        this.Controls.Add(FirstText);
        //Declare, properties and call a TextBox

        SecondText = new TextBox();
        SecondText.Text = $"";
        SecondText.Top = 50;
        SecondText.Left = 0;
        SecondText.Height = 50;
        SecondText.Width = 210;
        this.Controls.Add(SecondText);
        //Declare, properties and call a TextBox

        ThirdText = new TextBox();
        ThirdText.Text = $"0";
        ThirdText.Top = 100;
        ThirdText.Left = 0;
        ThirdText.Height = 50;
        ThirdText.Width = 210;
        this.Controls.Add(ThirdText);
        //Declare, properties and call a TextBox

    }
    public Form()
    {
        InitializeComponent();
        this.StartPosition = FormStartPosition.Manual;
        this.Location = new Point(0, 0);
    }
    static void Main()
    {
        Application.Run(new MyButtonClass());
        //starting objects of class MyButtonClass
    }
}

Answer 1

Declare the type that the method returns or voidif nothing returns.
But what about the piece of code you provided?