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asp.net - Use Session variable in html

I get a session variable from a login form and then redirect to another page:

    String a = Login1.UserName;
    Session["user"] = a;
    Response.Redirect("~/Home.aspx");

In Home.aspx I wish to display in a div something like " Hello -Session["user"] " . How can I get the session var and use it in the html code?

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Use a code block:

Hello <%:Session["user"]%>

Or if before .NET 4.0:

Hello <%=Server.HtmlEncode(Session["user"])%>

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