C#

From msdn:

The Load method of the System..::.AppDomain class can load assemblies, but is primarily used for COM interoperability. It should not be used to load assemblies into an application domain other than the application domain from which it is called.

class Example
{
  public Example(int count){ vendor = new Vendor[count];}
  public Vendor[] vendor;
  //...
};

class Program
{
  public static void Main()
  {
    // read the vendorCount from configuration file
    Example example = new Example(vendorCount);
    //..
  }
}

private void Dig(string file)
        {
            DirFiles = Directory.GetFileSystemEntries(file);
            foreach (string subFile in DirFiles)
            {
                FileInfo SubFi = new FileInfo(subFile);
                if (!SubFi.Attributes.ToString().Contains("Directory"))
                    if (!listBox1.Items.Contains(subFile))
                        listBox1.Items.Add(subFile);
                else
                    Dig(subFile);
            }
        }