在C#中，為了簡化ListView的代碼，您可以使用以下方法：

1. 使用LINQ查詢來填充ListView的數據。這樣可以減少循環和條件語句的數量，使代碼更加簡潔。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;

public class ListViewExample : Form
{
    private ListView listView;
    private List<Person> people;

    public ListViewExample()
    {
        listView = new ListView();
        listView.Dock = DockStyle.Fill;
        listView.Columns.Add("Name", 100);
        listView.Columns.Add("Age", 50);

        people = new List<Person>
        {
            new Person { Name = "Alice", Age = 30 },
            new Person { Name = "Bob", Age = 25 },
            new Person { Name = "Charlie", Age = 35 }
        };

        listView.Items.AddRange(people.Select(p => new ListViewItem(new[] { p.Name, p.Age.ToString() })).ToArray());

        this.Controls.Add(listView);
    }

    public static void Main()
    {
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);
        Application.Run(new ListViewExample());
    }
}

public class Person
{
    public string Name { get; set; }
    public int Age { get; set; }
}

2. 使用數據綁定來填充ListView的數據。這樣可以進一步減少代碼量，使代碼更加簡潔。

using System;
using System.Collections.ObjectModel;
using System.Windows.Forms;

public class ListViewExample : Form
{
    private ListView listView;
    private ObservableCollection<Person> people;

    public ListViewExample()
    {
        listView = new ListView();
        listView.Dock = DockStyle.Fill;
        listView.Columns.Add("Name", 100);
        listView.Columns.Add("Age", 50);

        people = new ObservableCollection<Person>
        {
            new Person { Name = "Alice", Age = 30 },
            new Person { Name = "Bob", Age = 25 },
            new Person { Name = "Charlie", Age = 35 }
        };

        listView.ItemsSource = people;

        this.Controls.Add(listView);
    }

    public static void Main()
    {
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);
        Application.Run(new ListViewExample());
    }
}

public class Person
{
    public string Name { get; set; }
    public int Age { get; set; }
}

這兩種方法都可以簡化ListView的代碼，使代碼更加簡潔和易于維護。