Sets the FieldName property
            
 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 Selector WithFieldName( string fieldName )
 Parameters
 Parameters- fieldName (String)
- The value to set for the FieldName property
 Return Value
 Return Valuethis instance