private IEnumerable<CommandMetaData> LoadCommandsFromDirectory(DirectoryInfo directory)
{
AppDomain domain = null;
var commands = new List<CommandMetaData>();
foreach (var file in directory.EnumerateFiles("*.dll", SearchOption.TopDirectoryOnly))
{
try
{
var assembly = Assembly.LoadFrom(file.FullName);
foreach (var type in assembly.GetExportedTypes())
{
if (type.GetInterface("ShellMe.CommandLine.CommandHandling.ICommand") != null && !type.IsAbstract)
{
if (domain == null)
{
var domainSetup = new AppDomainSetup()
{
ApplicationBase = directory.FullName
};
domain = AppDomain.CreateDomain("Sandbox Domain", null, domainSetup);
}
var assemblyName = assembly.FullName;
var typeName = type.FullName;
var metaData = new CommandMetaData()
{
Domain = domain,
AssemblyName = assemblyName,
TypeName = typeName
};
var command = CreateCommand(metaData);
metaData.Command = command;
commands.Add(metaData);
}
}
}
catch (Exception e)
{
// Ignore DLLs that are not .NET assemblies.
}
}
return commands;
}
private ICommand CreateCommand(CommandMetaData commandMetaData)
{
return (ICommand)commandMetaData.Domain.CreateInstanceAndUnwrap(commandMetaData.AssemblyName, commandMetaData.TypeName);
}