c# 操作excel当关闭excel后，进程中还存在EXCEL.EXE没有关闭，大佬们这是什么情况？

```namespace cs_excel2

{

    public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
        Excel.Application excel = new Excel.Application();
        Excel.Workbook ewb = excel.Workbooks.Add(true); 
        excel.Visible = false;                          
        excel.DisplayAlerts = false;                    
        Excel.Worksheet ews = (Excel.Worksheet)ewb.Worksheets[1];
        excel.Worksheets.Add();                                  
        ews.Name = "record";
        ews.Cells[1, 1] = "opopop";
        ews.Cells[1.2].Interior.Color = Color.ForestGreen;
        Thread.Sleep(2000);
        ewb.SaveAs(Directory.GetCurrentDirectory() + @"\new1.xlsx");
        ewb.Close();
        excel.Quit();
    }


}

}

![图片说明](https://img-ask.csdn.net/upload/202003/26/1585220052_659689.png)

Process.GetProcesses().First(x => x.Name.ToUpper() == "EXCEL.EXE").Kill();