从表单c继承＃

大家。我的计划是创建一个单独的类，我将在其中声明所有的标签和文本框值。但要做到这一点，我必须从表单继承。问题是，当我从窗体继承时，我的类变成了窗体并从它自身调用元素。将标签和文本框的属性设置为公共不会有帮助。有任何想法吗？从表单c继承＃

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Threading.Tasks; 
using System.Windows.Forms; 

namespace Assignment2v3 
{ 
class Declarations : Form1 
{ 
    public List<Label> ErrRep 
    { get; set; } 
    public List<TextBox> TextBoxes 
    { get; set; } 
    public List<ComboBox> ComboBoxes 
    { get; set; } 
    public Declarations() 
    { 
     ErrRep = DeclareErrorReports(); 
     TextBoxes = DeclareTextBoxes(); 
     ComboBoxes = DeclareComboBoxes(); 
    } 
    List<Label> DeclareErrorReports() 
    { 
     var ER = new List<Label>(); 
     ER.Add(errorReport1); 
     ER.Add(errorReport2); 
     ER.Add(errorReport3); 
     return ER; 
    }//Would be used if try catch worked 
    List<TextBox> DeclareTextBoxes() 
    { 
     List<TextBox> TextBoxes = new List<TextBox>(); 
     TextBoxes.Add(textBoxPizza1); 
     TextBoxes.Add(textBoxPizza2); 
     TextBoxes.Add(textBoxPizza3); 
     return TextBoxes; 
    }//Puts all textBoxes into a list 
    List<ComboBox> DeclareComboBoxes() 
    { 
     var ComboBoxes = new List<ComboBox>(); 
     ComboBoxes.Add(comboBoxPizza1); 
     ComboBoxes.Add(comboBoxPizza2); 
     ComboBoxes.Add(comboBoxPizza3); 
     return ComboBoxes; 
    }//Puts all comboboxes into a list 
    //^Boring declarations 
} 
}