1.

namespace WpfApp7{    /// 
    /// MainWindow.xaml 的交互逻辑    /// 
    public partial class MainWindow : Window    {        public MainWindow()        {            InitializeComponent();            ObservableCollection
     
       empList =                new ObservableCollection
      
       ();            for (int i = 0; i < 20; i++)            {                Employee emp = new Employee                {                    FirstName = "FirstName" + i,                    LastName = "LastName" + i,                    EmailId = "EmailId" + i,                    Contact = "Contact" + i,                };                empList.Add(emp);            }            dataGrid.ItemsSource = empList;        }    }    public class Employee    {        public string FirstName { get; set; }        public string LastName { get; set; }        public string EmailId { get; set; }        public string Contact { get; set; }    }}
      
     

 2.

namespace WpfApp7{    /// 
    /// MainWindow.xaml 的交互逻辑    /// 
    public partial class MainWindow : Window    {        public MainWindow()        {            InitializeComponent();            ObservableCollection
     
       empList =                new ObservableCollection
      
       ();            for (int i = 0; i < 20; i++)            {                Employee emp = new Employee                {                    FirstName = "FirstName" + i,                    LastName = "LastName" + i,                    EmailId = "EmailId" + i,                    Contact = "Contact" + i,                };                empList.Add(emp);            }            grid.ItemsSource = empList;        }    }    public class Employee    {        public string FirstName { get; set; }        public string LastName { get; set; }        public string EmailId { get; set; }        public string Contact { get; set; }    }}