Tuple<'T1, 'T2, 'T3, 'T4, 'T5>.IStructuralEquatable.Equals Method (Object, IEqualityComparer)


Returns a value that indicates whether the current Tuple<'T1, 'T2, 'T3, 'T4, 'T5> object is equal to a specified object based on a specified comparison method.

Namespace:   System
Assembly:  mscorlib (in mscorlib.dll)

private abstract Equals : 
        other:Object *
        comparer:IEqualityComparer -> bool
private override Equals : 
        other:Object *
        comparer:IEqualityComparer -> bool


Type: System.Object

The object to compare with this instance.

Type: System.Collections.IEqualityComparer

An object that defines the method to use to evaluate whether the two objects are equal.

Return Value

Type: System.Boolean

true if the current instance is equal to the specified object; otherwise, false.

This member is an explicit interface member implementation. It can be used only when the Tuple<'T1, 'T2, 'T3, 'T4, 'T5> instance is cast to an IStructuralEquatable interface.

The IEqualityComparer.Equals implementation is called only if other is not null, and if it can be successfully cast (in C#) or converted (in Visual Basic) to a Tuple<'T1, 'T2, 'T3, 'T4, 'T5> object whose components are of the same types as the current instance. The IStructuralEquatable.Equals(Object, IEqualityComparer) method first passes the Item1 values of the Tuple<'T1, 'T2, 'T3, 'T4, 'T5> objects to be compared to the IEqualityComparer.Equals implementation. If this method call returns true, the method is called again and passed the Item2 values of the two Tuple<'T1, 'T2, 'T3, 'T4, 'T5> objects. This continues until the method call returns false when it compares a specific pair of Item values, or the two Item5 values are passed to the method.

The following example defines a DoubleComparer class that implements the IEqualityComparer interface. The example instantiates two Tuple<'T1, 'T2, 'T3, 'T4, 'T5> objects by using a random number generator to populate their second through fifth components, casts the first instance to an IStructuralEquatable interface, and then uses a DoubleComparer object to test the two Tuple<'T1, 'T2, 'T3, 'T4, 'T5> objects for approximate equality.

No code example is currently available or this language may not be supported.

Universal Windows Platform
Available since 8
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Available since 4.0
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1
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