AWS SDK for .NET Documentation
ComparisonOperator Property
AmazonAmazon.DynamoDB.ModelConditionComparisonOperator Did this page help you?   Yes   No    Tell us about it...
A comparison operator is an enumeration of several operations: Scan operations support all available comparison operators. Query operations support a subset of the available comparison operators: EQ, LE, LT, GE, GT, BETWEEN, and BEGINS_WITH.

Constraints:

Allowed Values
EQ, NE, IN, LE, LT, GE, GT, BETWEEN, NOT_NULL, NULL, CONTAINS, NOT_CONTAINS, BEGINS_WITH

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

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