Parameterized route fragments ( {parameter} ) should match parameter names. <example> products/{id} products/add products/add/{sku} service/helloworld/{name}/{company} </example><remarks> Applies only to CallbackHandler based handlers. Doesn't have any effect on Page methods called with AjaxMethodCallback

Routes need to *uniquely* identify a method in a CallbackHandler. Make sure you don't have the same route or same partially parameterized route pointing at multiple methods - in which case you may end up with routing mismatches. stocks/{symbol} stocks/{symbollist} </remarks>