匿名类型相等

匿名类型相等由 Equals 实例方法给出。如果两个对象具有相同的类型，并且对于每个属性具有相等的值（通过 a.Prop.Equals(b.Prop)），则它们是相等的。

var anon = new { Foo = 1, Bar = 2 };
var anon2 = new { Foo = 1, Bar = 2 };
var anon3 = new { Foo = 5, Bar = 10 };
var anon3 = new { Foo = 5, Bar = 10 };
var anon4 = new { Bar = 2, Foo = 1 };
// anon.Equals(anon2) == true
// anon.Equals(anon3) == false
// anon.Equals(anon4) == false (anon and anon4 have different types, see below)

当且仅当它们的属性具有相同的名称和类型并且以相同的顺序出现时，才认为两个匿名类型相同。

var anon = new { Foo = 1, Bar = 2 };
var anon2 = new { Foo = 7, Bar = 1 };
var anon3 = new { Bar = 1, Foo = 3 };
var anon4 = new { Fa = 1, Bar = 2 };
// anon and anon2 have the same type
// anon and anon3 have diferent types (Bar and Foo appear in different orders)
// anon and anon4 have different types (property names are different)