Adds elements to the ExpressionNames collection
            
 Declaration Syntax
 Declaration Syntax| C# | 
[ObsoleteAttribute("The With methods are obsolete and will be removed in version 2 of the AWS SDK for .NET. See http://aws.amazon.com/sdkfornet/#version2 for more information.")] public DescribeExpressionsRequest WithExpressionNames( IEnumerable<string> expressionNames )
 Parameters
 Parameters- expressionNames (IEnumerable<(Of <(<'String>)>)>)
- The values to add to the ExpressionNames collection
 Return Value
 Return Valuethis instance