Indicates whether the property represented by a given property description, property definition, or property template is required to have a value (true) or not (false). If you attempt to save an object containing a property that requires a value and that property does not have a value assigned to it, an exception will result.

Property IsValueRequired As Nullable(Of Boolean)

Nullable<bool> IsValueRequired { get; set; }

property Nullable<bool> IsValueRequired {
	Nullable<bool> get ();
	void set (Nullable<bool> value);
}

function get_isValueRequired();
function set_isValueRequired(value);