打开表单时出现错误。

是 NET.Framework 4.8。重写为 NET.Core 5。那里没有什么可重写的。2班的东西。

当我尝试显示我更改了空格的表单时，会发生不允许显示表单的错误

索引超出范围。索引必须是一个正数，并且它的大小不能超过集合的大小。参数名称： Microsoft.DotNet.DesignTools.Client.DesignerSession.FindDesignableClass(CodeCompileUnit compileUnit)
中 System.CodeDom.CodeTypeDeclarationCollection.get_Item(Int32 index) 中 System.Collections.CollectionBase.System.Collections.IList.get_Item(Int32 index)中的索引 在 Microsoft.VisualStudio.WinForms.RemoteClient.Loader.RemoteCodeDomDesignerLoader.EnsureDocument（IDesignerSerializationManager 管理器） 在 Microsoft.VisualStudio.WinForms.RemoteClient.Loader.RemoteCodeDomDesignerLoader.PerformLoad（IDesignerSerializationManager 管理器）



在 Microsoft.VisualStudio.Design.Serialization.CodeDom.VSCodeDomDesignerLoader.PerformLoad(IDesignerSerializationManager serializationManager)
--- 从先前发生异常的位置结束堆栈跟踪 ---
在 Microsoft.VisualStudio.Design.Serialization.CodeDom.VSCodeDomDesignerLoader.PerformLoad(IDesignerSerializationManager serializationManager )
在 System.ComponentModel.Design.Serialization.BasicDesignerLoader.BeginLoad(IDesignerLoaderHost 主机)

代码本身，例如 MainForm.cs

using SFP.Classes;
using SFP.Methods;
using System.Windows.Forms;
namespace SFP
{
    namespace Forms
    {
        public partial class MainForm : Form
        {
            public MainForm()
            {
                InitializeComponent();
            }
        }
    }
}

MainForm.Designer.cs

namespace SFP
{
    namespace Forms
    {
        partial class MainForm
        {
            /// <summary>
            /// Обязательная переменная конструктора.
            /// </summary>
            private System.ComponentModel.IContainer components = null;

            /// <summary>
            /// Освободить все используемые ресурсы.
            /// </summary>
            /// <param name="disposing">истинно, если управляемый ресурс должен быть удален; иначе ложно.</param>
            protected override void Dispose(bool disposing)
            {
                if (disposing && (components != null))
                {
                    components.Dispose();
                }
                base.Dispose(disposing);
            }

            #region Код, автоматически созданный конструктором форм Windows

            /// <summary>
            /// Требуемый метод для поддержки конструктора — не изменяйте 
            /// содержимое этого метода с помощью редактора кода.
            /// </summary>
            private void InitializeComponent()
            {
                this.components = new System.ComponentModel.Container();
                System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(MainForm));
                this.OpenDialog = new System.Windows.Forms.OpenFileDialog();
                this.FormContainer = new System.Windows.Forms.Panel();
                this.SuspendLayout();
                // 
                // OpenDialog
                // 
                this.OpenDialog.FileName = "OpenDialog";
                this.OpenDialog.ReadOnlyChecked = true;
                this.OpenDialog.RestoreDirectory = true;
                this.OpenDialog.ShowReadOnly = true;
                this.OpenDialog.SupportMultiDottedExtensions = true;
                // 
                // FormContainer
                // 
                resources.ApplyResources(this.FormContainer, "FormContainer");
                this.FormContainer.Name = "FormContainer";
                // 
                // MainForm
                // 
                resources.ApplyResources(this, "$this");
                this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
                this.Controls.Add(this.FormContainer);
                this.KeyPreview = true;
                this.Name = "MainForm";
                this.ResumeLayout(false);

            }

            #endregion
            private System.Windows.Forms.ImageList MenuImagesSmall;
            private System.Windows.Forms.ImageList MenuImagesLarge;
            public System.Windows.Forms.OpenFileDialog OpenDialog;
            private System.Windows.Forms.Panel FormContainer;
        }
    }
}

程序.cs

using SFP.Forms;
using System;
using System.Windows.Forms;
namespace SFP
{
    static class Program
    {
        /// <summary>
        ///  The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.SetHighDpiMode(HighDpiMode.SystemAware);
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new MainForm());
        }
    }
}

应用程序启动并像错误之前一样运行。