public ReportDto GetTheMostProfitableAuthor()
{
AuthorDto theMostProfitableAuthor = BookStorage.Instance.GroupBy(book => book.Author)
.Select(book => new { Author = book.Key, TotalProfit = book.Sum(b => b.TotalSoldPrice) })
.OrderByDescending(book => book.TotalProfit)
.FirstOrDefault()
.Author;
var report = new ReportDto
{
Name = "TheMostProfitableAuthorReport",
ReportContent = new List <string> {
theMostProfitableAuthor.ToString()
}
};
return(report);
}
