Indicates whether this instance and a specified object are equal.
mscorlib (in mscorlib.dll)
Public Overrides Function Equals (
obj As Object
) As Boolean
The object to compare with the current instance.
true if obj and this instance are the same type and represent the same value; otherwise, false.
The ValueType.Equals(Object) method overrides Object.Equals(Object) and provides the default implementation of value equality for all value types in the .NET Framework.
If none of the fields of the current instance and obj are reference types, the Equals method performs a byte-by-byte comparison of the two objects in memory. Otherwise, it uses reflection to compare the corresponding fields of obj and this instance.
Particularly if your value type contains fields that are reference types, you should override the Equals(Object) method. This can improve performance and enable you to more closely represent the meaning of equality for the type.
When you call the Equalsmethod on a Windows Runtime structure, it provides the default behavior for value types that don’t override Equals. This is part of the support that the .NET Framework provides for the Windows Runtime (see .NET Framework Support for Windows Store Apps and Windows Runtime). Windows Runtime structures can’t override Equals, even if they’re written with C# or Visual Basic, because they can’t have methods. (In addition, structures in the Windows Runtime itself don’t inherit ValueType.) However, they appear to have ToString, Equals, and GetHashCode methods when you use them in your C# or Visual Basic code, and the .NET Framework provides the default behavior for these methods.
The following example demonstrates how the Equals method can be overridden by a derived value type.
Public Structure Complex
Private m_Re As Double
Private m_Im As Double
Public Overloads Function Equals(ob As Object) As Boolean
If TypeOf ob Is Complex Then
Dim c As Complex = CType(ob, Complex)
Return m_Re = c.m_Re And m_Im = c.m_Im
Public Overloads Function GetHashCode() As Integer
Return m_Re.GetHashCode() ^ m_Im.GetHashCode()
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Available since 4.5.NET Framework
Available since 1.1Portable Class Library
Supported in: portable .NET platformsSilverlight
Available since 2.0Windows Phone Silverlight
Available since 7.0Windows Phone
Available since 8.1