AWS SDK for .NET Documentation
TableName Property
AmazonAmazon.DynamoDB.ModelQueryRequestTableName Did this page help you?   Yes   No    Tell us about it...
The name of the table in which you want to query. Allowed characters are a-z, A-Z, 0-9, _ (underscore), - (hyphen) and . (period).

Constraints:

Length
3 - 255
Pattern
[a-zA-Z0-9_.-]+

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

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