private static void ShowEmployeeTotalSalariesVerySlow()
 {
     var context = new SoftUniDbContext();
     decimal totalSalaries = 0;
     foreach (var emp in context.Employees)
     {
         totalSalaries += emp.Salary;
     }
     Console.WriteLine("Total salaries: {0:f2}", totalSalaries);
 }
 private static void ShowEmployeeTotalSalariesSlow()
 {
     var context = new SoftUniDbContext();
     var empSalaries = context.Employees.Select(e => e.Salary);
     decimal totalSalaries = 0;
     foreach (var salary in empSalaries)
     {
         totalSalaries += salary;
     }
     Console.WriteLine("Total salaries: {0:f2}", totalSalaries);
 }
 private static void ShowEmployeeTotalSalariesFast()
 {
     var context = new SoftUniDbContext();
     decimal totalSalaries = context.Employees.Sum(e => e.Salary);
     Console.WriteLine("Total salaries: {0:f2}", totalSalaries);
 }