private static PluginHandler[] DiscoverPlugins(DirectoryInfo[] probingDirectories)
{
// Initialize a list that will contain all plugin types discovered
List <PluginHandler> pluginHandlers = new List <PluginHandler> ();
if (probingDirectories != null)
{
// Iterate over the probing directories and look for plugins
foreach (DirectoryInfo directory in probingDirectories)
{
if (directory.Exists)
{
// Try to load plugins from each dll
foreach (FileInfo file in directory.GetFiles("*.dll"))
{
try
{
// Load the dll into an assembly
Assembly assembly = Assembly.LoadFrom(file.FullName);
// Iterate over all types contained in the assembly
foreach (Type type in assembly.GetTypes())
{
// Only consider public, concrete types that implement IPlugin
if (type.IsPublic && !type.IsAbstract && typeof(IPlugin).IsAssignableFrom(type))
{
PluginHandler pluginHandler = PluginHandler.FromType(type);
if (pluginHandler != null)
{
pluginHandlers.Add(pluginHandler);
}
}
}
}
catch (Exception exception)
{
Utilities.DefaultTraceSource.TraceEvent(TraceEventType.Error, 0, "A failure occurred while trying to load the {0} Plugin: {1}{2}", file.FullName, Environment.NewLine, exception.ToString());
}
}
}
}
}
// Return the list of plugin types discovered
return(pluginHandlers.ToArray());
}