Pass values from one object to another form C # [duplicate]

Hello, I believe global variables are the solution to this:

public class Main
{ 
    public static string User_ID { get; set; }
}

A public static (global) variable can be called in other forms of the application with the name of the class and its name:

Main.User_ID

For more details, search for global types.

You can create a property of the type of your class in the form you want to receive the object and pass the object in the form pain builder, see an example below.

Form that will receive the object:

public partial class Form2 : Form
{
    private User user;

    public Form2(User user)
    {
        InitializeComponent();

        this.user = user;
    }
}

And the form that will send the object to the form it is calling:

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    private void button1_Click(object sender, System.EventArgs e)
    {
        User user = new User
        {
            User_ID = 1,
            Name = "Fulano",
            Email = "[email protected]"
        };

        var form = new Form2(user);            
        form.Show();            
    }
}

In this way you can manipulate the values of your object within the form without any kind of interference.