title: 'ScriptServiceAttribute' is ambiguous in the namespace 'System.Web.Script.Services'
body: <p>I'm currently working on an existing ASP.NET project. At the moment I have to integrate 
  a new componant so for that purpose I had to change the framework target from 2.0 to 3.5. After regenerating the solution, I'm now dealing with a strange issue. </p>
  
  <p>Here's the code : </p>
  
  <pre><code>&lt;WebService(Namespace:="http://tempuri.org/")&gt; _
  &lt;WebServiceBinding(ConformsTo:=WsiProfiles.BasicProfile1_1)&gt; _
  &lt;Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()&gt; _
  &lt;System.Web.Script.Services.ScriptService()&gt; _
  </code></pre>
  
  <p>And the last line returns that error : </p>
  
  <pre><code>'ScriptServiceAttribute' is ambiguous in the namespace 'System.Web.Script.Services'
  </code></pre>
  
  <p>I have definitely no clue what's going on in my code ?! Is it an internal error of the ScriptService constructor ?</p>
  
  <p>Thanks in advance for your help ! </p>