/// <summary>
/// True if ReferenceOutputAssembly is true or empty.
/// All other values will be false.
/// </summary>
private static bool IsReferenceOutputAssemblyTrueOrEmpty(IVsReferenceItem item)
{
var value = GetPropertyValueOrNull(item, ProjectBuildProperties.ReferenceOutputAssembly);
return(MSBuildStringUtility.IsTrueOrEmpty(value));
}