ASP.NET <a href create query string param issue

I am having an issue with my <a href returning a value to dynamically create a query string param.

<a href='mypage.aspx?ID=<%# GetID() %>'>test</a><br />

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protected string GetID()
    return ViewState["ID"].ToString();

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when I mouse over it shows as:


I need it to display


Any ideas?
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Rajar AhmedConsultantCommented:
try this
 <a href='mypage.aspx?ID=<%= GetID() %>'>test</a>

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CipherISAuthor Commented:

When I remove the # it errors.
Jesus RodriguezIT ManagerCommented:
<a href='mypage.aspx?ID=<%# Eval(GetID()) %>'>test</a><br />
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