C#

// Get paths of all available libraries in Plugin directory.
string[] filePaths = Directory.GetFiles(FormMain.PluginsDirectoryPath, "*.dll");
			
for (int i = 0; i < filePaths.Length; i++)
{
  try
  {
    // Load the assembly and get the defined types.
    Assembly assembly = Assembly.LoadFrom(filePaths[i]);
    Type[] types = assembly.GetTypes();
					
    IPlugin plugin;
    for (int j = 0; j < types.Length; j++)
    {
      if (types[j].GetInterface(typeof(IPlugin).FullName) != null)
      {// The type implements IPlugin interface.
        //Create an instance of the IPlugin implementation and store it.
        plugin = (IPlugin) Activator.CreateInstance(types[j]);
        this.plugins.Add(plugin);
      }
    }
  }
}