public string? LongArgumentNamePrefix { get; set; }Public Property LongArgumentNamePrefix As String
	Get
	Set
Dim instance As ParseOptionsAttribute
Dim value As String
value = instance.LongArgumentNamePrefix
instance.LongArgumentNamePrefix = valuepublic:
property String^ LongArgumentNamePrefix {
	String^ get ();
	void set (String^ value);
}This property is only used if the Mode or ParseOptionsMode property is ParsingModeLongShort, or if the PrefixTermination or ParseOptionsPrefixTermination property is not PrefixTerminationModeNone.
Use the ArgumentNamePrefixes to specify the prefixes for short argument names.
This value can be overridden by the ParseOptionsLongArgumentNamePrefix property.