Gets and sets the property EnvironmentName. 
            
            The         name of the environment to update. If no environment with this name  
                  exists,       AWS Elastic Beanstalk         returns an          CopyC#
                    error.
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                    error.      
            InvalidParameterValue
                     Condition: You must specify either this or an EnvironmentId, or both.   
                   If you do not specify either, AWS Elastic Beanstalk returns  CopyC#
            error.
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            error.        
            MissingRequiredParameter
 Declaration Syntax
 Declaration Syntax| C# | 
public string EnvironmentName { get; set; }