Add Done and Dismiss Keyboard for UITextView in Xamarin

gistfile1.cs

// sample text box
var deedDescriptionField = new UITextView (new RectangleF (0, 230, UIScreen.MainScreen.Bounds.Width, 100)){
	BackgroundColor = UIColor.White,
	Text = " Description:",
	TextColor = ViewHelpers.DarkGray,
	Font = UIFont.FromName("Helvetica", 18f)
};
// change the return key to done
descriptionField.ReturnKeyType = UIReturnKeyType.Done;
// dismiss keyboard on done 
descriptionField.ShouldChangeText = (text, range, replacementString) => {
	if (replacementString.Equals ("\n")) {
		deedDescriptionField.EndEditing (true);
		return false;
	} else {
		return true;
	}
};