public async Task <int> CreateAsync(CreateDepartmentDto request)
{
if (await _departmentRepository.AnyAsync(x => x.Name.Equals(request.Name)))
{
throw new ValidationException($"Error: {request.Name } already exist");
}
var department = new Department
{
Name = request.Name,
Description = request.Description
};
_departmentRepository.Add(department);
return(await _unitOfWork.SaveChangesAsync());
}