public string Execute(IList <string> inputParameters) { //Assign Values From List Of Parameters string personToAddToTeam = inputParameters[0]; string teamToAddPersonTo = inputParameters[1]; //Validations var personTypeForChecking = "Person Name"; inputValidator.IsNullOrEmpty(personToAddToTeam, personTypeForChecking); var teamTypeForChecking = "Team Name"; inputValidator.IsNullOrEmpty(teamToAddPersonTo, teamTypeForChecking); businessLogicValidator.ValidateTeamExistance(allTeams, teamToAddPersonTo); businessLogicValidator.ValidateMemberExistance(allMembers, personToAddToTeam); businessLogicValidator.ValidateIfMemberAlreadyInTeam(allTeams, teamToAddPersonTo, personToAddToTeam); //Operations var teamToAddMember = allTeams.AllTeamsList[teamToAddPersonTo]; this.teamOperations.AddMember(teamToAddMember, allMembers.AllMembersList[personToAddToTeam]); return(string.Format(PersonAddedToTeam, personToAddToTeam, teamToAddPersonTo)); }