Original page shows briefly although I used Server.Transfer

Hello,
 
I'm using Server.Transfer to transfer users from one page to another.
I call the method inside the Page_Load method, if a certian criteria exists.
However, the resulting user experience is that the original page is displayed (very briefly) and than reloaded as the correct page (the one I transferred to).
I'm looking for a way to avoid this. 
Thanks!
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