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);
      }
    }
  }
}

class myClass
{
	// fields
	private string _name;
	private double[] _number = new double[5];
	
	// properties
	public string name
	{
		get { return _name; }
		set { _name = value; }
	}
	
	public double[] number
	{
		get { return _number; }
		set { _number = value; }
	}
	
	public double this[int index]
	{
		get { return _number[index]; }
		set { _number[index] = value; }
	}
	
	// Default constructor:
	public myClass()
	{
		name = "";
		_number[0] = 0;
		_number[1] = 0;
		_number[2] = 0;
		_number[3] = 0;
		_number[4] = 0;
	}
	// Clear Numbers
	public void ClearNumbers()
	{
		_number[0] = 0;
		_number[1] = 0;
		_number[2] = 0;
		_number[3] = 0;
		_number[4] = 0;
	}
}

myClass foo = new myClass();

double firstElement = foo.number[0];

double firstElement = foo[0];