public class EmployeeComparer : IComparer{ public int Compare(Employee x, Employee y) { if (x.LastName.Equals(y.LastName)) { return x.FirstName.CompareTo(y.FirstName); } else { return x.LastName.CompareTo(y.LastName); } } }
public class CustomObjectComparer : IComparerIn this example, we define a CustomObjectComparer class that takes two custom objects as input and compares their integer values. If the integer values are the same, we return 0. If they are different, we return a negative value if the first object's integer value comes before the second object's integer value, or we return a positive value if it comes after. The IComparer interface is part of the System.Collections library in C#.{ public int Compare(CustomObject x, CustomObject y) { return x.IntegerValue.Equals(y.IntegerValue) ? 0 : x.IntegerValue.CompareTo(y.IntegerValue); } }