AWS SDK for .NET Documentation
Exists Property
AmazonAmazon.SimpleDB.ModelUpdateConditionExists Did this page help you?   Yes   No    Tell us about it...
Gets and sets the Exists property. Check for the existence of the attribute used for the conditional check. If this field is unspecified or true, UpdateCondition.Value must be set to a value. If this field is false, UpdateCondition.Value should not have a value assigned to it. If no value is associated with this field, SimpleDB uses a default value of 'true'
Declaration Syntax
C#
public bool Exists { get; set; }

Assembly: AWSSDK (Module: AWSSDK) Version: 1.5.60.0 (1.5.60.0)