C# - Can't Pass A Variable To A User Control?

I am using the below example code and have a problem where I can't pass the Request.RawUrl value into an object that extends the Control object (class Test below).When I use the line:

<Test1:Test runat="server" ID="testControl" Target="<%# Request.RawUrl %>"></Test1:Test>

I find that the Target property is never called.If I use this line instead:

<Test1:Test runat="server" ID="testControl" Target="<%# Request.RawUrl %> test"></Test1:Test>

the string value "<%# Request.RawUrl %> test" is passed to the Target property.f I use this line as explained in many posts online:

<Test1:Test runat="server" ID="testControl" Target="<%= Request.RawUrl %>"></Test1:Test>

the string value "<%= Request.RawUrl %>" is passed to the Target property.I need to get the value of Request.RawUrl passed to the Target Property of my Test control object. Does anyone have any ideas where I am going wrong?Control:

namespace Testing
{
public class Test : Control

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