B窗体继承于A窗体，B启动：问题点

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ExtCtrls;

type
  TForm1 = class(TForm)
    pnl1: TPanel;
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

end.
//---------
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, Unit1, ExtCtrls;

type
  TForm2 = class(TForm1)  // 继承于TForm1类
    pnl2: TPanel;
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form2: TForm2;

implementation

{$R *.dfm}

end.

object Form1: TForm1
  Left = 201
  Top = 123
  Width = 333
  Height = 305
  Caption = 'Form1'
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'MS Sans Serif'
  Font.Style = []
  OldCreateOrder = False
  PixelsPerInch = 96
  TextHeight = 13
  object pnl1: TPanel
    Left = 48
    Top = 32
    Width = 161
    Height = 185
    Caption = 'pnl1'
    Color = clSkyBlue
    TabOrder = 0
  end
end
//------------
inherited Form2: TForm2
  Width = 324
  Height = 320
  Caption = 'Form2'
  PixelsPerInch = 96
  TextHeight = 13
  inherited pnl1: TPanel
    Left = 32
    Top = 64
    Width = 105
    Height = 161
  end
  object pnl2: TPanel
    Left = 168
    Top = 64
    Width = 121
    Height = 169
    Caption = 'pnl2'
    Color = 16764159
    TabOrder = 1
  end
end

Delphi2C#工具转换后，有异常无法编译

仅需要改 //Unit2.Designer.cs

namespace Unit2
{
  partial class TForm2
    {
        public System.Windows.Forms.Panel pnl1;
        public System.Windows.Forms.Panel pnl2;

#region Windows Form Designer generated code
        private void InitializeComponent()
        {
            this.pnl1 = new System.Windows.Forms.Panel();
            this.pnl2 = new System.Windows.Forms.Panel();
            this.pnl1.Size  = new System.Drawing.Size(105, 161);
            this.pnl1.Location  = new System.Drawing.Point(32, 64);
            this.pnl1.Enabled = true;
            this.pnl1.Name = "pnl1";
            this.pnl1.BackColor = System.Drawing.SystemColors.ButtonFace;
            this.pnl2.Size  = new System.Drawing.Size(121, 169);
            this.pnl2.Location  = new System.Drawing.Point(168, 64);
            this.pnl2.Enabled = true;
            this.pnl2.TabIndex = 1;
            this.pnl2.Name = "pnl2";
            this.pnl2.Text = "pnl2";
            this.pnl2.BackColor = 16764159;
        }
#endregion

    }
}

//这是修改后的代码
namespace Unit2
{
  partial class TForm2
    {
        //public System.Windows.Forms.Panel pnl1;// 第一处屏蔽
        public System.Windows.Forms.Panel pnl2;

#region Windows Form Designer generated code
        private void InitializeComponent()
        {
           //this.pnl1 = new System.Windows.Forms.Panel(); 第二 屏蔽
            this.pnl2 = new System.Windows.Forms.Panel();
            this.SuspendLayout();
            // 
            // pnl1
            // 
            this.pnl1.BackColor = System.Drawing.SystemColors.MenuHighlight; //第二并列 在窗体改panel颜色，就自动加了这三句话
            this.pnl1.Location = new System.Drawing.Point(32, 64);
            this.pnl1.Size = new System.Drawing.Size(105, 161);
            // 
            // pnl2
            // 
            this.pnl2.BackColor = System.Drawing.Color.AliceBlue;//第三改颜色值
            this.pnl2.Location = new System.Drawing.Point(168, 64);
            this.pnl2.Name = "pnl2";
            this.pnl2.Size = new System.Drawing.Size(121, 169);
            this.pnl2.TabIndex = 1;
            this.pnl2.Text = "pnl2";
            // 
            // TForm2 //第四 加以下一段代码
            // 
            this.ClientSize = new System.Drawing.Size(394, 275);
            this.Controls.Add(this.pnl2);
            this.Location = new System.Drawing.Point(0, 0);
            this.Name = "TForm2";
            this.Text = "Form1-form2";
            this.Controls.SetChildIndex(this.pnl1, 0);
            this.Controls.SetChildIndex(this.pnl2, 0);
            this.ResumeLayout(false);

        }
#endregion

    }
}

 

、、-----------以下为错误的，不用看

using System;
using System.Windows.Forms;
using Unit1;
using Unit2;
namespace Project1.Units
{
    public class Project1
    {
        // Form1
        // Form2
        [STAThread]
        public static void Main(string[] args)
        {
            // Application.Initialize;
            Unit1.Units.Unit1.Form1 = new TForm1();
            Unit2.Units.Unit2.Form2 = new TForm2();
            // Application.Run;
            Application.Run(Unit2.Units.Unit2.Form2);//改第一处，这默认是Form1先启动，要改成Form2
        }

    } // end Project1

}

namespace Unit1
{
  partial class TForm1
    {
        public System.Windows.Forms.Panel pnl1;
        private System.ComponentModel.Container components = null;
        private System.Windows.Forms.ToolTip toolTip1 = null;

        // Clean up any resources being used.
        protected override void Dispose(bool disposing)
        {
            if(disposing)
            {
                if(components != null)
                {
                    components.Dispose();
                }
            }
            base.Dispose(disposing);
        }

#region Windows Form Designer generated code
        private void InitializeComponent()
        {
            System.Resources.ResourceManager resources = new System.Resources.ResourceManager(this.GetType());
            this.components = new System.ComponentModel.Container();
            this.toolTip1 = new System.Windows.Forms.ToolTip(this.components);
            this.pnl1 = new System.Windows.Forms.Panel();
            this.SuspendLayout();
            this.Location  = new System.Drawing.Point(201, 123);
            this.ClientSize  = new System.Drawing.Size(422, 403);
            this.Font  = new System.Drawing.Font("MS Sans Serif", 8F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point ,((byte)(1)));
            this.BackColor = System.Drawing.SystemColors.ButtonFace;
            this.Name = "Form1";
            this.Text = "Form1";
            this.AutoScroll = true;
            this.pnl1.Size  = new System.Drawing.Size(161, 185);
            this.pnl1.Location  = new System.Drawing.Point(80, 72);
            this.pnl1.Enabled = true;
            this.pnl1.TabIndex = 0;
            this.pnl1.Name = "pnl1";
            this.pnl1.Text = "pnl1";
            this.pnl1.BackColor = 54545; //System.Drawing.Color.SkyBlue; 改第二处，这里要写成这样的格式
            this.Controls.Add(pnl1);
            this.ResumeLayout(false);
        }
#endregion

    }
}