Tuple<T1, T2, T3, T4>.IStructuralComparable.CompareTo Method
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Compares the current Tuple<T1, T2, T3, T4> object to a specified object by using a specified comparer and returns an integer that indicates whether the current object is before, after, or in the same position as the specified object in the sort order.
Assembly: mscorlib (in mscorlib.dll)
- Type: System.Object
An object to compare with the current instance.
- Type: System.Collections.IComparer
An object that provides custom rules for comparison.
Return ValueType: System.Int32
A signed integer that indicates the relative position of this instance and other in the sort order, as shown in the following table.
A negative integer
This instance precedes other.
This instance and other have the same position in the sort order.
A positive integer
This instance follows other.
Although this method can be called directly, it is most commonly called by collection sorting methods that include IComparer parameters to order the members of a collection, such as the Array.Sort(Array, IComparer) method.
The method is intended for use in sorting operations. It should not be used when the primary purpose of a comparison is to determine whether two objects are equal. To determine whether two objects are equal, call the IStructuralEquatable.Equals(Object, IEqualityComparer) method.
The following example creates an array of Tuple<T1, T2, T3, T4> objects that contain statistical data about baseball pitchers. The data items include the name of the pitcher, the number of innings pitched, the pitcher's earned run average (the average number of runs a pitcher allows per game), and the number of hits the pitcher has given up. The example displays the component of each tuple in the array in unsorted order, sorts the array, and then calls ToString to display the value of each tuple in sorted order. To sort the array, the example defines a generic PitcherComparer class that implements the IComparer interface and sorts the Tuple<T1, T2, T3, T4> objects in ascending order by the value of their third component (the earned run average) rather than their first component. Note that the example does not directly call the method. This method is called implicitly by the Array.Sort(Array, IComparer) method for each element in the array.