accessing a code behind variable from aspx

hi experts, the below is trivial but it is driving me nuts!
for simplicity i am addressing my problem like this, i am doing the following code in the code behind:

public string x = "L";
      
            private void Page_Load(object sender, System.EventArgs e)
            {
                  if (!IsPostBack)
                  {                        
                        x = "ss";
                                          }
                  else
                  {
                        x = "ddd";
                                          }                  
            }

and am trying to access variable x from the aspx like this:
<td><%# x %></td>
my actual goal is to have more complex coding but have reduced my approach to first accessing x in its simples form.  just that i haev tried this on 2 different webforms now and am getting an empty string.  on other webforms i have used far more complex similar functionality and either i am missing some webform setting or else some magic is determining that this does not work, the end result is that i am going crazy. your help would be apprecaited. 10x a lot.
stephen_rotaAsked:
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Pratima PharandeConnect With a Mentor Commented:
for the problem you mentioned in above = is the correct solution ......
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Pratima PharandeCommented:
<td><%= x %></td>

try this

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stephen_rotaAuthor Commented:
it works great 10x, I have worked wonders with # but always giving hassles until it works, once it works all is fine. do you know fo any issues? is = the correct syntax to say 'evaluate'? i will use the = to concatenate strings inside a javascript open window and so forth.
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stephen_rotaAuthor Commented:
10x.
but it does not work when i try to access a string from the code behind named switchInfoImageOpen like this:
<IMG id="SwitchInfoImage" runat="server" height="200" width="200" onclick="openImage('<%= switchInfoImageOpen %>')">
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stephen_rotaAuthor Commented:
i get
onclick="openImage('<%= switchInfoImageOpen %>')" />
for the last part
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stephen_rotaAuthor Commented:
solved: it just happens (correct me if i am wrong) that you cannot put a runat=server if you want an evaluation within the tag, so i removed runat=server and it worked fine. 10x for the good tip pratima mcs
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