public override bool Equals(object obj)
{
if (!(obj is AnotherCustomer))
{
return(false);
}
AnotherCustomer item = (AnotherCustomer)obj;
return(Id.Equals(item.Id));
}
public static int CompareBy <T>(Func <AnotherCustomer, T> comparison, AnotherCustomer x, AnotherCustomer y)
{
if (comparison == null)
{
throw new ArgumentNullException(nameof(comparison));
}
IComparable a = comparison(x) as IComparable;
if (a == null)
{
throw new ArgumentException(nameof(comparison));
}
return(a.CompareTo(comparison(y)));
}
static void Main(string[] args)
{
var c = new Customer()
{
Id = 10, Name = "bbb", LastName = "zzz"
};
var c1 = new Customer()
{
Id = 10, Name = "ccc", LastName = "yyy"
};
Console.WriteLine(Customer.CompareBy(e => e.LastName, c, c1));
var c2 = new AnotherCustomer()
{
Id = 10, Name = "bbb", LastName = "fff"
};
var c3 = new AnotherCustomer()
{
Id = 10, Name = "ccc", LastName = "yyy"
};
Console.WriteLine(AnotherCustomer.CompareBy(e => e.Id, c2, c3));
Console.WriteLine(c2 > c3);
}
public static bool LessThan(AnotherCustomer x, AnotherCustomer y)
{
return(string.Compare(x.Name, y.Name) < 0);
}
public static bool GreaterThan(AnotherCustomer x, AnotherCustomer y)
{
return(string.Compare(x.Name, y.Name) > 0);
}