How to pass data from one form to multiple forms VB.net - vb.net

Question

My Form1 looks like this to get the value of textbox to pass the data to multiple forms.:
Public Class Form1
Public username As String
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
username = TextBox1.Text
Form2.Show()
Me.Close()
End Sub
End Class
At the second form, I used this code to show the data of username which was entered from the Form1.:
Public Class Form2
Private Sub Form2_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Label1.Text = "Hi " & Form1.username & "!"
End Sub
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Form3.Show()
Me.Close()
End Sub
End Class
It worked perfectly. The data showed up in the second form. But in Form3, it only shows "Form1"
Form3 code:
Public Class Form3
Private Sub Form3_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Label2.Text = Form1.username
End Sub
What should I do to make the data of username to show up on mutiple forms?

Answer 1

Do not use default instances of forms, create constructors for forms which takes username as parameter and then create forms explicitly
Public Class Form3
Private _username As String
Public Sub New(username As String)
_username = username
End Sub
Private Sub Form3_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Label2.Text = _username
End Sub
End Class
Public Class Form2
Private _username As String
Public Sub New(username As String)
_username = username
End Sub
Private Sub Form2_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Label1.Text = $"Hi {_username}!"
End Sub
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim formThree As new Form3(_username)
formThree.Show()
Me.Close()
End Sub
End Class
Public Class Form1
Private _username As String
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim formThree As new Form3(TextBox1.Text)
formThree.Show()
Me.Close()
End Sub
End Class
With this approach you don't need to expose username as public property for Form1.