/// <summary>
/// Initializes a new instance of the AlphanumericBehavior class by copying it from
/// another AlphanumericBehavior object. </summary>
/// <param name="behavior">The AlphanumericBehavior object to copied (and then disposed of). It must not be null. </param>
/// <exception cref="ArgumentNullException">behavior is null. </exception>
/// <remarks>After the behavior.TextBox object is copied, Dispose is called on the behavior parameter. </remarks>
public AlphanumericBehavior(AlphanumericBehavior behavior) : base(behavior) { this.invalidChars = behavior.invalidChars; }
/// <summary>
/// Initializes a new instance of the AlphanumericTextBox class by assigning its Behavior field
/// to an instance of <see cref="AlphanumericBehavior" /> and passing it string of characters to consider invalid. </summary>
/// <param name="invalidChars">
/// The set of characters not allowed, concatenated into a string. </param>
public AlphanumericTextBox(string invalidChars) { behavior = new AlphanumericBehavior(this, invalidChars); }
/// <summary>
/// Initializes a new instance of the AlphanumericTextBox class by explicitly assigning its Behavior field. </summary>
/// <param name="behavior">
/// The <see cref="AlphanumericBehavior" /> object to associate the textbox with. </param>
public AlphanumericTextBox(AlphanumericBehavior behavior) : base(behavior) { }
/// <summary>
/// Initializes a new instance of the AlphanumericTextBox class by assigning its Behavior field
/// to an instance of <see cref="AlphanumericBehavior" />. </summary>
public AlphanumericTextBox() { behavior = new AlphanumericBehavior(this); }
