RuleCollectionAddAsync Method

public void AddAsync(
	string propertyName,
	Object error,
	Func<Task<bool>> rule
)

Public Sub AddAsync ( 
	propertyName As String,
	error As Object,
	rule As Func(Of Task(Of Boolean))
)

Parameters

propertyName  String

Name of the property that is associated with the rule.

error  Object

Object that provides information about disability.

rule  FuncTaskBoolean

Delegate method or Lambda expression used to check the rule.

Reference