About persistance of WebForm class in ASP.NET

[Free]

Hi,

I have a question about ASP.NET :

Here is an example of WebForm code. 2 buttons and 1 textbox.
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Public Class MyWebPage
Inherits System.Web.UI.Page

Protected WithEvents MyButton1 As System.Web.UI.WebControls.Button
Protected WithEvents MyButton2 As System.Web.UI.WebControls.Button
Protected WithEvents TextBox1 As System.Web.UI.WebControls.TextBox

' Web Form Designer Generated Code

Private m_strMyString As String

Private Sub MyButton1_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyButton1.Click
m_strMyString = "Hello"
End Sub

Private Sub MyButton2_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyButton2.Click
TextBox1.Text = m_strMyString
End Sub

End Class
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When I click MyButton1, I set m_strMyString to "Hello" but after that, if I
click on MyButton2, m_strMyString is Nothing.
Each time I return to server all variables are erased.
Is it normal ?
Is ther a way to correct this without using Session variables or shared
variables ?

Thanks a lot

Guillaume