How do I load variable value to label text?

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ASP.NET

Hi. I'm learning at ASP.NET (C#) and have a label, but I don't know how to load the variable value (protected field - data type is string) to label text.

I wrote this in default.aspx

<asp:Label ID="Label1" Text="Hello, <%= name %>" runat="server" />

and behind code:

protected string name = null;

protected void Button1_Click()
{
string temp = this.TextBox1.Text;
this.name = temp;
}

But it doesn't work and I don't know why.

Can you give me anyway to fix it?

Thank you!