应用程序运行良好，但表单设计显示空白

Question

我尝试制作它，以便我的表单不会显示为空白。它之前正在工作，它不会让我一次保存我的文件所以我将其重命名为 form3temp ，现在表单显示在我运行它时，但不是在我看它时在设计视图中。表格5也做同样的事情。我的7个表格的其余部分都很好。

内部设计如何出现 https://i.gyazo.com/06994988ff2f307d5042c0bafec1c43e.png 我运行应用程序时的显示方式 https://gyazo.com/97c1838e55f5f595b09211f2ee742c9f

namespace LawnCarePrototype
{
    public partial class Form31 : Form
    {
        public static decimal yardCost = 0.0M;
        decimal yardSizeMultiplier = 0.0M;

        public Form31()
        {
            InitializeComponent();
        }

        private void Form3_Load(object sender, EventArgs e)
        {
        }

        private void button2_Click(object sender, EventArgs e)
        {
            yardSizeMultiplier = 0.0M;
            yardCost = 0.0M;

            if (radioButton1.Checked)
            {
                yardSizeMultiplier = 0.8M;
            }
            if (radioButton2.Checked)
            {
                yardSizeMultiplier = 1.0M;
            }
            if (radioButton3.Checked)
            {
                yardSizeMultiplier = 1.2M;
            }

            if (checkBox1.Checked)
            {
                yardCost =+ 15.00M * yardSizeMultiplier;
                //2 EDGE
                Global.edgeExp = 15.00M * yardSizeMultiplier;
            }
            if (checkBox2.Checked)
            {
                yardCost =+30.00M * yardSizeMultiplier;
                Global.bushExp = 30.00M * yardSizeMultiplier;

                //3 BUSH
            }
            if (checkBox3.Checked)
            {
                yardCost =+ 25.00M * yardSizeMultiplier;
                Global.leafExp = 25.00M * yardSizeMultiplier;
                //4 LEAF
            }
            if (checkBox4.Checked)
            {
                yardCost =+ 35.00M * yardSizeMultiplier;
                //1 LAWN
                Global.MowExp = 35.00M * yardSizeMultiplier;
            }
            if (yardCost == 0.00M)
            {
                MessageBox.Show("Please Input Your Selection");
            }
            else
            {
                Form4 form4obj = new Form4();
                form4obj.Show();
                this.Close();

            }

            Global.subTotal = yardCost;
        }


        private void checkBox1_CheckedChanged(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            Form2 form2obj = new Form2();
            form2obj.Show();
            this.Close();
        }

        private void radioButton1_CheckedChanged(object sender, EventArgs e)
        {

        }


        private void checkBox4_CheckedChanged(object sender, EventArgs e)
        {

        }

        private void pictureBox1_Click(object sender, EventArgs e)
        {

        }

        private void groupBox1_Enter(object sender, EventArgs e)
        {

        }
    }
}

我希望表单设计能够出现，因为我没有看到任何错误。 不确定在我的代码中可能导致这种情况。

旁注：抱歉代码格式不佳！