EqualityComparer<T>.Equals(T, T) Method

Reference

Definition

Namespace:: System.Collections.Generic

Assemblies:: mscorlib.dll, System.Collections.dll

Assemblies:: netstandard.dll, System.Collections.dll

Assembly:: System.Collections.dll

Assembly:: mscorlib.dll

Assembly:: netstandard.dll

Source:: EqualityComparer.cs

Source:: EqualityComparer.cs

Source:: EqualityComparer.cs

Important

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When overridden in a derived class, determines whether two objects of type T are equal.

public:
 abstract bool Equals(T x, T y);

public abstract bool Equals(T x, T y);

public abstract bool Equals(T? x, T? y);

override this.Equals : 'T * 'T -> bool

Public MustOverride Function Equals (x As T, y As T) As Boolean

Parameters

x: T

The first object to compare.

y: T

The second object to compare.

Returns

Boolean

true if the specified objects are equal; otherwise, false.

Implements

Equals(T, T)

Remarks

The Equals method is reflexive, symmetric, and transitive. That is, it returns true if used to compare an object with itself; true for two objects x and y if it is true for y and x; and true for two objects x and z if it is true for x and y and also true for y and z.

Notes to Implementers

Implementations are required to ensure that if the Equals(T, T) method returns true for two objects x and y, then the value returned by the GetHashCode(T) method for x must equal the value returned for y.

Applies to

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.6, 2.0, 2.1
UWP	10.0

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