C#: ViewModelBase class

C# WPF – An Observable String Dictionary class, which can be useful for storing and binding values as (key, value) pairViewModelBase class which implements INotifyPropertyChanged in C# WPF .

An Observable String Dictionary class, which can be useful for storing and binding values as key, value pairs

	public abstract class ViewModelBase : INotifyPropertyChanged
	{
	/// <summary>
	/// Multicast event for property change notifications.
	/// </summary>
	public event PropertyChangedEventHandler PropertyChanged;
	/// <summary>
	/// Checks if a property already matches a desired value. Sets the property and
	/// notifies listeners only when necessary.
	/// </summary>
	/// <typeparam name="T">Type of the property.</typeparam>
	/// <param name="storage">Reference to a property with both getter and setter.</param>
	/// <param name="value">Desired value for the property.</param>
	/// <param name="propertyName">Name of the property used to notify listeners.This
	/// value is optional and can be provided automatically when invoked from compilers that
	/// support CallerMemberName.</param>
	/// <returns>True if the value was changed, false if the existing value matched the
	/// desired value.</returns>
	protected virtual bool SetProperty<T>(ref T storage, T value, [CallerMemberName] string propertyName = null)
	{
	if (object.Equals(storage, value)) return false;
	storage = value;
	// Log.DebugFormat("{0}.{1} = {2}", this.GetType().Name, propertyName, storage);
	this.OnPropertyChanged(propertyName);
	return true;
	}
	/// <summary>
	/// Notifies listeners that a property value has changed.
	/// </summary>
	/// <param name="propertyName">Name of the property used to notify listeners. This
	/// value is optional and can be provided automatically when invoked from compilers
	/// that support <see cref="CallerMemberNameAttribute"/>.</param>
	protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
	{
	var eventHandler = this.PropertyChanged;
	if (eventHandler != null)
	eventHandler(this, new PropertyChangedEventArgs(propertyName));
	}
	}

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