AWS SDK for .NET Documentation
ReturnValues Property
AmazonAmazon.DynamoDB.ModelDeleteItemRequestReturnValues Did this page help you?   Yes   No    Tell us about it...
Use this parameter if you want to get the attribute name-value pairs before or after they are modified. For PUT operations, the possible parameter values are NONE (default) or ALL_OLD. For update operations, the possible parameter values are NONE (default) or ALL_OLD, UPDATED_OLD, ALL_NEW or UPDATED_NEW.

Constraints:

Allowed Values
NONE, ALL_OLD, UPDATED_OLD, ALL_NEW, UPDATED_NEW

Declaration Syntax
C#
public string ReturnValues { get; set; }

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