C# 4 and .NET 4

192 ❘ ChaPTer 8 deleGAtes, lAmbdAs, And events
}
}
sortArray[i + 1] = temp;
swapped = true;
}
}
} while (swapped);
code snippet BubbleSorter/BubbleSorter.cs
To use this class, you need to define some other class, which you can use to set up an array that needs
sorting. For this example, assume that the Mortimer Phones mobile phone company has a list of employees
and wants them sorted according to salary. The employees are each represented by an instance of a class,
Employee, which looks similar to this:
class Employee
{
public Employee(string name, decimal salary)
{
this.Name = name;
this.Salary = salary;
}
public string Name { get; private set; }
public decimal Salary { get; private set; }
public override string ToString()
{
return string.Format("{0}, {1:C}", Name, Salary);
}
}
public static bool CompareSalary(Employee e1, Employee e2)
{
return e1.Salary < e2.Salary;
}
code snippet BubbleSorter/Employee.cs
Notice that to match the signature of the Func delegate, you have to define CompareSalary
in this class as taking two Employee references and returning a Boolean. In the implementation the
comparison based on salary is performed.
Now you are ready to write some client code to request a sort:
using System;
namespace Wrox.ProCSharp.Delegates
{
class Program
{
static void Main()
{
Employee[] employees =
{
new Employee("Bugs Bunny", 20000),
new Employee("Elmer Fudd", 10000),
new Employee("Daffy Duck", 25000),
new Employee("Wile Coyote", 1000000.38m),
new Employee("Foghorn Leghorn", 23000),
new Employee("RoadRunner", 50000)
};
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