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Tuple<T1, T2, T3, T4, T5>.Item1 Property

Gets the value of the current Tuple<T1, T2, T3, T4, T5> object's first component.

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

public T1 Item1 { get; }

Property Value

Type: T1
The value of the current Tuple<T1, T2, T3, T4, T5> object's first component.

You can dynamically determine the type of the Item1 component in one of two ways:

  • By calling the GetType method on the value that is returned by the Item1 property.

  • By retrieving the Type object that represents the Tuple<T1, T2, T3, T4, T5> object, and retrieving the first element from the array that is returned by its Type.GetGenericArguments method.

The following example defines an array of Tuple<T1, T2, T3, T4, T5> objects whose components contain the name of a state in the United States, its population in 1990 and 2000, its population change in this 10-year period, and the percentage change in its population. It then iterates through the array and displays the value of each component in a tuple.

using System;

public class Example
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
      outputBlock.FontFamily = new System.Windows.Media.FontFamily("Courier New");

      // Define array of tuples reflecting population change by state, 1990-2000.
      Tuple<string, int, int, int, double>[] statesData = 
         { Tuple.Create("California", 29760021, 33871648, 4111627, 13.8), 
           Tuple.Create("Illinois", 11430602, 12419293, 988691, 8.6), 
           Tuple.Create("Washington", 4866692, 5894121, 1027429, 21.1) };

      // Display the items of each tuple
      outputBlock.Text += String.Format("{0,-12}{1,18}{2,18}{3,15}{4,12}\n", "State",
                        "Population 1990", "Population 2000", "Change",
                        "% Change") + "\n";
      foreach (Tuple<string, int, int, int, double> stateData in statesData)
         outputBlock.Text += String.Format("{0,-12}{1,18:N0}{2,18:N0}{3,15:N0}{4,12:P1}",
                           stateData.Item1, stateData.Item2,
                           stateData.Item3, stateData.Item4, stateData.Item5 / 100) + "\n";
// The example displays the following output:
//    State          Population 1990   Population 2000         Change    % Change
//    California          29,760,021        33,871,648      4,111,627      13.8 %
//    Illinois            11,430,602        12,419,293        988,691       8.6 %
//    Washington           4,866,692         5,894,121      1,027,429      21.1 %


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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