Как правильно добавлять компоненты?

#include "GradientPanel.h"
using namespace System;
using namespace System::Windows::Forms;
using namespace System::Drawing;
using namespace System::Drawing::Drawing2D;
 
   ref class GradientPanel : System::Windows::Forms::Panel
   {
      public: Color ColorTop;
      public: Color ColorBottom;
 
            RectangleF myRectangleF = RectangleF(30.6F, 30.7F, 40.8F, 100.9F);
         protected: System::Void OnPaint(System::Object^ sender, System::Windows::Forms::PaintEventArgs^ e)
         {
            LinearGradientBrush^ linGrBrush =
               gcnew System::Drawing::Drawing2D::LinearGradientBrush(myRectangleF,
                  ColorTop,
                  ColorBottom,
                  LinearGradientMode::Horizontal);
 
            Graphics^ graphics = e->Graphics;
            graphics->FillRectangle(linGrBrush, RectangleF(1, 1, 1, 1));
            System::Windows::Forms::Panel::OnPaint(e);
         }
   };

namespace Rush {
 
   public ref class GradientPanel : System::Windows::Forms::Panel
    {
 
      
    };
}