title: Why is my project's assembly missing from the package when I debug?
body: <p>I've got a SharePoint project that I've been debugging for some time without problems.</p>
  
  <p>Today I added a feature receiver to the project's only feature. I've not yet changed anything about the empty receiver class that Visual Studio adds by default.</p>
  
  <p>The "Package" command now generates a package which includes my project's DLL file (as you'd expect -- adding a feature receiver shouldn't change anything about this).</p>
  
  <p>However, when I debug, the generated package does <em>not</em> include my project's DLL file, and the deployment effort fails with the following error:</p>
  
  <blockquote>
    <p>Error occurred in deployment step 'Add Solution': Failed to load
    receiver assembly "ABC, Version=1.0.0.0, Culture=neutral,
    PublicKeyToken=2377fad544a7c307" for feature "ABC_XYZ Feature" (ID:
    dca34989-a2f2-413b-b5c4-958e0bbb84ef).:
    System.IO.FileNotFoundException: Could not load file or assembly 'ABC,
    Version=1.0.0.0, Culture=neutral, PublicKeyToken=2377fad544a7c307' or
    one of its dependencies. The system cannot find the file specified.
    File name: 'ABC, Version=1.0.0.0, Culture=neutral,
    PublicKeyToken=2377fad544a7c307'    at
    System.Reflection.Assembly._nLoad(AssemblyName fileName, String
    codeBase, Evidence assemblySecurity, Assembly locationHint,
    StackCrawlMark&amp; stackMark, Boolean throwOnFileNotFound, Boolean
    forIntrospection)    at
    System.Reflection.Assembly.InternalLoad(AssemblyName assemblyRef,
    Evidence assemblySecurity, StackCrawlMark&amp; stackMark, Boolean
    forIntrospection)    at System.Reflection.Assembly.InternalLoad(String
    assemblyString, Evidence assemblySecurity, StackCrawlMark&amp; stackMark,
    Boolean forIntrospection)    at System.Reflection.Assembly.Load(String
    assemblyString)    at
    Microsoft.SharePoint.Administration.SPFeatureDefinition.get_ReceiverObject()</p>
    
    <p>WRN: Assembly binding logging is turned OFF. To enable assembly bind
    failure logging, set the registry value
    [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1. Note: There
    is some performance penalty associated with assembly bind failure
    logging. To turn this feature off, remove the registry value
    [HKLM\Software\Microsoft\Fusion!EnableLog].</p>
  </blockquote>
  
  <p>Removing the feature receiver allows me to again debug without issue, but the problem returns as soon as I re-add the feature receiver.</p>
  
  <p>I've tried cleaning and rebuilding, and then debugging, but the error won't go away unless/until I remove the feature receiver.</p>
  
  <p>Why does my project's assembly get included in the package when I use the "Package" command, but not when I use the "Start Debugging" command, and what about adding the feature receiver causes this to happen?</p>