C# Enumerable First(IEnumerable, Func)

Description

Returns the first element in a sequence that satisfies a specified condition.

Syntax

public static TSource First<TSource>(
  this IEnumerable<TSource> source,
  Func<TSource, bool> predicate
)

Parameters

• TSource - The type of the elements of source.
• source - An IEnumerable to return an element from.
• predicate - A function to test each element for a condition.

Returns

Returns the first element in a sequence that satisfies a specified condition.

Example

The following code example demonstrates how to use First to return the first element of an array that satisfies a condition.

// w  ww.j  av a2s . co m
using System;
using System.Linq;
using System.Collections.Generic;
public class MainClass{
  public static void Main(String[] argv){  

    int[] numbers = { 9, 34, 65, 67, 12, 19 };

    int first = numbers.First(number => number > 80);

    Console.WriteLine(first);

  }
}