implement INotifyPropertyChanged

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Import namespace

using System.ComponentModel;

Code

public class MyClass : INotifyPropertyChanged
{
    private int _value;

    // property that uses interface
    public int Value
    {
        get
        {
            return _value;
        }
        set
        {
            if (value != _value) // check if value is not same
            {
                _value = value;
                OnPropertyChanged("Value"); // invoke event
            }
        }
    }

    // interface member
    public event PropertyChangedEventHandler PropertyChanged;

    // invocation of event
    private void OnPropertyChanged(string propertyName)
    {
        if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
    }
}

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