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Tuple<T1, T2>.Equals Method

Returns a value that indicates whether the current Tuple<T1, T2> object is equal to a specified object.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)
public override bool Equals(
	Object obj
)

Parameters

obj
Type: System.Object
The object to compare with this instance.

Return Value

Type: System.Boolean
true if the current instance is equal to the specified object; otherwise, false.

The obj parameter is considered to be equal to the current instance under the following conditions:

  • It is a Tuple<T1, T2> object.

  • Its two components are of the same types as the current instance.

  • Its two components have the same values as those of the current instance.

The following example calls the Tuple<T1, T2>.Equals(Object) method to determine whether any of the objects in an array of Tuple<T1, T2> objects are equal to one another. The output reflects the fact that the Equals(Object) method returns true when comparing Tuple<T1, T2> objects whose components have equal values.


using System;

public class Example
{
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {
      Tuple<string, Nullable<int>>[] scores = 
                      { new Tuple<string, Nullable<int>>("Dan", 90),
                        new Tuple<string, Nullable<int>>("Ernie", null),
                        new Tuple<string, Nullable<int>>("Jill", 88),
                        new Tuple<string, Nullable<int>>("Ernie", null), 
                        new Tuple<string, Nullable<int>>("Nancy", 88), 
                        new Tuple<string, Nullable<int>>("Dan", 90) };

      // Compare the Tuple objects
      for (int ctr = 0; ctr < scores.Length; ctr++)
      {
         Tuple<string, Nullable<int>> currentTuple = scores[ctr];
         for (int innerCtr = ctr + 1; innerCtr < scores.Length; innerCtr++)
         {
            outputBlock.Text += String.Format("{0} = {1}: {2}",
                              scores[ctr], scores[innerCtr],
                              scores[ctr].Equals(scores[innerCtr])) + "\n";
         }
         outputBlock.Text += "\n";
      }
   }
}
// The example displays the following output:
//       (Dan, 90) = (Ernie, ): False
//       (Dan, 90) = (Jill, 88): False
//       (Dan, 90) = (Ernie, ): False
//       (Dan, 90) = (Nancy, 88): False
//       (Dan, 90) = (Dan, 90): True
//       
//       (Ernie, ) = (Jill, 88): False
//       (Ernie, ) = (Ernie, ): True
//       (Ernie, ) = (Nancy, 88): False
//       (Ernie, ) = (Dan, 90): False
//       
//       (Jill, 88) = (Ernie, ): False
//       (Jill, 88) = (Nancy, 88): False
//       (Jill, 88) = (Dan, 90): False
//       
//       (Ernie, ) = (Nancy, 88): False
//       (Ernie, ) = (Dan, 90): False
//       
//       (Nancy, 88) = (Dan, 90): False


Silverlight

Supported in: 5, 4

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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