The TextBoxControlBuilder class is used internally by ASP.NET. It is created by the page parser when it encounters a <mobile:TextBox> element, and used to take the literal text in the tag and add it to the TextBox.Text property.
public class TextBoxControlBuilder : MobileControlBuilder { // Public Constructors public TextBoxControlBuilder( ); // Public Instance Methods public override bool AllowWhitespaceLiterals( ); // overrides MobileControlBuilder }