title: ILMerge build task copylocal missing
body: <p>I try to use ILMerge Task in Visual Studio 2015</p>
  
  <p>I get this german error message, see translation to english below:</p>
  
  <blockquote>
    <p>MSBuild.ILMerge.Task.targets(35,5): error MSB4096: Das Element
    "....\my.dll" in der Elementliste "ReferencePath" definiert keinen
    Wert für die CopyLocal-Metadaten. Wenn Sie diese Metadaten verwenden
    möchten, qualifizieren Sie sie, indem Sie %(ReferencePath.CopyLocal)
    angeben, oder vergewissern Sie sich, dass alle Elemente in der Liste
    einen Wert für diese Metadaten definieren.</p>
  </blockquote>
  
  <p>Translated Message: </p>
  
  <blockquote>
    <p>MSBuild.ILMerge.Task.targets(35,5): error MSB4096: the element
    "....\my.dll" in the element list "ReferencePath" defines no vale for
    the CopyLocal-Metadata. If you want to use this this meta data,
    qualify it, by specifying %(ReferencePath.CopyLocal), or ensure all
    elements in the list have a value for this meta data.</p>
  </blockquote>
  
  <p>My solution contains a mein project building a wpf application and a sub project building to my.dll.</p>
  
  <p>I cannot figure out what this message wants to tell me.
  Where is missing what?
  Can you help?</p>