solution moved to root; exchange added from lib
fixed namespaces
moved entities to separate files
refactored db & repositories
moved to Repository folder
exchange repository added
added test project, enabled nuget restore
parameterized queries and changed int type to bool for Is_Required, Is_Organizer fields
Removed HasEvaluated field
Moved Exchange user name & password to app config

Created AppConfiigReader class for getting information from app config.
Removed UserRepository from ApointmentRepository

Organizer is the same attendee as other attendees.
Installed NLog using Nuget package manager
Moved program.cs logic to exchangerepository.cs
cleaned unnecessary code from AppConfigReader.cs
renamed variables and passing entity as parameters
realized logging to file using NLog and delete old ErrorLog