Anonymous type equality

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Anonymous type equality is given by the Equals instance method. Two objects are equal if they have the same type and equal values (through a.Prop.Equals(b.Prop)) for every property.

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)

Two anonymous types are considered the same if and only if their properties have the same name and type and appear in the same order.

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)

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Anonymous types:
* Anonymous type equality

Table Of Contents
17 Regex
19 Arrays
21 Enum
22 Tuples
24 GUID
27 Looping
33 Anonymous types
36 Casting
46 Methods
88 Events
92 Structs
104 Indexer
106 Stream
107 Timers
109 Threading
127 Caching
135 Pointers
147 C# Script