public string? LongArgumentNamePrefix { get; set; }Public Property LongArgumentNamePrefix As String
	Get
	Set
Dim instance As ParseOptions
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 property or the ParseOptionsAttributeMode is ParsingModeLongShort, or if the PrefixTermination or ParseOptionsAttributePrefixTermination property is not PrefixTerminationModeNone.
Use the ArgumentNamePrefixes to specify the prefixes for short argument names.
If not , this property overrides the value of the ParseOptionsAttributeLongArgumentNamePrefix property.