ValueType.Equals Method
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Indicates whether this instance and a specified object are equal.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public Overrides Function Equals ( _
obj As Object _
) As Boolean
public override bool Equals(
Object obj
)
Parameters
- obj
Type: System.Object
Another object to compare to.
Return Value
Type: System.Boolean
true if obj and this instance are the same type and represent the same value; otherwise, false.
Remarks
The default implementation of the Equals method uses reflection to compare the corresponding fields of obj and this instance. Override the Equals method for a particular type to improve the performance of the method and more closely represent the concept of equality for the type.
Examples
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(ByVal 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
Else
Return False
End If
End Function
Public Overloads Function GetHashCode() As Integer
Return m_Re.GetHashCode() ^ m_Im.GetHashCode()
End Function
End Structure
public struct Complex
{
public double m_Re;
public double m_Im;
public override bool Equals(object ob)
{
if (ob is Complex)
{
Complex c = (Complex)ob;
return m_Re == c.m_Re && m_Im == c.m_Im;
}
else
{
return false;
}
}
public override int GetHashCode()
{
return m_Re.GetHashCode() ^ m_Im.GetHashCode();
}
}
Version Information
Silverlight
Supported in: 5, 4, 3
Silverlight for Windows Phone
Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0
XNA Framework
Supported in: Xbox 360, Windows Phone OS 7.0
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.