The Essential Xamarin.iOS NumericTextBox is an advanced version of the Entry control that restricts input to numeric values.
Also provides a gesture friendly UI culture and can be configured to display different formats like currency format, scientific format etc.
FormatString- Input string can be formatted by using the format strings.
Culture- Number format can be localized to any specific culture.
AllowNull- The control allows the user to set null value.
ParserMode- Value gets parsed based on this property.