title: Method not found: Void System.Web.UI.ScriptResourceDefinition.set_LoadSuccessExpression
body: <p>I have a web forms project that was started in asp.net 4.5.  I had to drop down to asp.net 4.0 since the host does not support 4.5.  It's been working fine, but now I'm getting the error: </p>
  
  <p>Method not found: 'Void System.Web.UI.ScriptResourceDefinition.set_LoadSuccessExpression(System.String)'</p>
  
  <p>I'm pretty sure it's because this method does not exist in 4.0, but I'm having trouble chasing down the source of this call. </p>
  
  <p>I'm using nuget package manager and that might be part of the problem if its pulling 4.5 libraries, but just not sure where to find the specific call.</p>
  
  <p>Any help would be appreciated.</p>
  
  <p>Thanks!</p>