How to change Items in a c-sharp list

The error you're encountering is due to trying to access a property Wins directly on the list raceCarDrivers, which doesn't make sense because raceCarDrivers is a list of Class2 objects, not a single Class2 object. You need to access the property Wins on a specific item within the list.

Here's how you can update the Wins property of a specific driver and update the TextBox accordingly:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel;

namespace DataBindingBasics01
{
    class Class2 : INotifyPropertyChanged
    {
        string name;
        int wins;

        public Class2(string name, int wins)
        {
            this.name = name;
            this.wins = wins;
        }

        //event
        public event PropertyChangedEventHandler PropertyChanged;

        public string Name
        {
            get { return this.name; }
            set { this.name = value; this.OnPropertyChanged("Name"); }
        }

        public int Wins
        {
            get { return this.wins; }
            set { this.wins = value; this.OnPropertyChanged("Wins"); }
        }

        //helper from the event
        void OnPropertyChanged(string propertyName)
        {
            if (this.PropertyChanged != null)
            {
                //this = object sender
                this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
            }
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            List raceCarDrivers = new List();

            // Populate list data source with data items
            raceCarDrivers.Add(new Class2("M. Schumacher", 500));
            raceCarDrivers.Add(new Class2("R. Schumacher", 501));
            raceCarDrivers.Add(new Class2("A. Senna", 502));
            raceCarDrivers.Add(new Class2("A. Prost", 503));
            raceCarDrivers.Add(new Class2("F. Schoebel", 504));

            // I want to change the second property (Wins) of M. Schumacher:
            Class2 driver = raceCarDrivers.FirstOrDefault(d => d.Name == "M. Schumacher");
            if (driver != null)
            {
                driver.Wins++;
                Console.WriteLine($"Wins of M. Schumacher: {driver.Wins}");
                // Assuming winsTextBox is a TextBox control in a UI, update it accordingly
                // this.winsTextBox.Text = driver.Wins.ToString();
            }
        }
    }
}

Here's a breakdown of what was done:

1. Class Declaration: The Class2 class implements the INotifyPropertyChanged interface to support data binding.
2. List Population: The raceCarDrivers list is populated with instances of Class2.
3. Access and Update Property: The specific driver is located using FirstOrDefault and the Wins property is incremented.
4. Updating UI: The updated Wins value is printed to the console. If you have a UI (like a TextBox), you can update it with the new Wins value.

Ensure you have the necessary using directives if you're integrating this into a larger project:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;

This code demonstrates updating the property of a specific object in a list and handling UI updates accordingly.

To change the value of the "Wins" property for a specific item in the list, you need to access that item by index and then modify its property. Here's how you can do it:
 

// Find the index of the item you want to modify
int index = raceCarDrivers.FindIndex(driver => driver.Name == "M. Schumacher");

// If the item is found, increment its "Wins" property
if (index != -1)
{
    raceCarDrivers[index].Wins++;
    this.winsTextBox.Text = raceCarDrivers[index].Wins.ToString();
}

This code snippet first finds the index of the item with the name "M. Schumacher" in the list using the FindIndex method. Then, if the item is found (index != -1), it increments the "Wins" property of that item and updates the winsTextBox with the new value.