#-------------------------------------------------------------
# Creates the class type and returns it to the calling method.
# Any fields, properties, or methods will need the object.  If
# no interface is need the simple call is made creating the
# type object as a Public class.  The first two parameters are
# the same in both DefineType calls.  In the cases where we are
# implementing an interface we need to pass in the Object
# constructor and the interface type we are implementing.
#-------------------------------------------------------------
  def define_class(class_name, interface=nil)
    if interface.nil?
      @mod_builder.DefineType("#{@namespace}.#{class_name}",
                               TypeAttributes.Public)
    else
      types = System::Collections::Generic::List.of(Type).new
      types.add interface

      tb = @mod_builder.DefineType("#{@namespace}.#{class_name}",
				   TypeAttributes.Public,
    				   System::Object.to_clr_type,
				   types.ToArray)

      tb
    end
  end