StringEnum..::..IsStringDefined Method

	Name	Description
	IsStringDefined(String)	Return the existence of the given string value within the enum.
	IsStringDefined(String, Boolean)	Return the existence of the given string value within the enum.
	IsStringDefined(Type, String)	Return the existence of the given string value within the enum.
	IsStringDefined(Type, String, Boolean)	Return the existence of the given string value within the enum.