/// <summary>
/// This method can be used to initialize the global container used by <see cref="CompositionInitializer.SatisfyImports(object)"/>
/// in case where the default container doesn't provide enough flexibility.
///
/// If this method is needed it should be called exactly once and as early as possible in the application host. It will need
/// to be called before the first call to <see cref="CompositionInitializer.SatisfyImports(object)"/>
/// </summary>
/// <param name="catalogs">
/// An array of <see cref="ComposablePartCatalog"/> that should be used to initialize the <see cref="CompositionContainer"/> with.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="catalogs"/> is <see langword="null"/>.
/// </exception>
/// <exception cref="InvalidOperationException">
/// Either <see cref="Initialize(CompositionContainer)" /> or <see cref="Initialize(ComposablePartCatalog[])" />has already been called or someone has already made use of the global
/// container via <see cref="CompositionInitializer.SatisfyImports(object)"/>. In either case you need to ensure that it
/// is called only once and that it is called early in the application host startup code.
/// </exception>
public static CompositionContainer Initialize(params ComposablePartCatalog[] catalogs)
{
AggregateCatalog aggregateCatalog = new AggregateCatalog(catalogs);
CompositionContainer container = new CompositionContainer(aggregateCatalog);
try
{
CompositionHost.Initialize(container);
}
catch
{
container.Dispose();
// NOTE : this is important, as this prevents the disposal of the catalogs passed as input arguments
aggregateCatalog.Catalogs.Clear();
aggregateCatalog.Dispose();
throw;
}
return(container);
}
public static void SetupTestGlobalContainer(ComposablePartCatalog catalog)
{
CompositionHost._container = null;
CompositionHost.Initialize(catalog);
}
public static void SetupTestGlobalContainer(CompositionContainer container)
{
CompositionHost._container = null;
CompositionHost.Initialize(container);
}
