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using System;
using System.ComponentModel;
using System.Diagnostics;
using System.Linq.Expressions;
//Event Design: http://msdn.microsoft.com/en-us/library/ms229011.aspx
namespace MicroMvvm
{
[Serializable]
public abstract class ObservableObject : INotifyPropertyChanged
{
[field: NonSerialized]
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void OnPropertyChanged(PropertyChangedEventArgs e)
{
var handler = this.PropertyChanged;
if (handler != null)
{
handler(this, e);
}
}
protected void RaisePropertyChanged<T>(Expression<Func<T>> propertyExpresssion)
{
var propertyName = PropertySupport.ExtractPropertyName(propertyExpresssion);
this.RaisePropertyChanged(propertyName);
}
protected void RaisePropertyChanged(String propertyName)
{
VerifyPropertyName(propertyName);
OnPropertyChanged(new PropertyChangedEventArgs(propertyName));
}
/// <summary>
/// Warns the developer if this Object does not have a public property with
/// the specified name. This method does not exist in a Release build.
/// </summary>
[Conditional("DEBUG")]
[DebuggerStepThrough]
public void VerifyPropertyName(String propertyName)
{
// verify that the property name matches a real,
// public, instance property on this Object.
if (TypeDescriptor.GetProperties(this)[propertyName] == null)
{
Debug.Fail("Invalid property name: " + propertyName);
}
}
}
}
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