C# SkipWhile Method

SkipWhile skips over elements matching a condition. This method is provided in the System.Linq namespace for the C# language. With SkipWhile you need to specify a Func condition to skip over values with.

This C# example program uses the SkipWhile extension method. It requires System.Linq.

Example

To start, we declare an array that has several values in it: the first three elements are less than 10. Then, we call SkipWhile with a Func that returns true for elements less than 10. The end result is the first three elements in the array are skipped.

Program that shows SkipWhile method [C#]

using System;
using System.Linq;

class Program
{
    static void Main()
    {
	int[] array = { 1, 3, 5, 10, 20 };
	var result = array.SkipWhile(element => element < 10);
	foreach (int value in result)
	{
	    Console.WriteLine(value);
	}
    }
}

Output

10
20

Practical uses. What is a practical usage of the SkipWhile method? In your program, you might have some reason to remove elements at the start of a collection that begin with a certain letter or have a property set to a certain value. You could use SkipWhile; then, you could call ToArray to ToList to convert the IEnumerable back into an array or List.

Summary

In this example, we used the SkipWhile method, which is part of the System.Linq namespace. This method can help you remove elements that match a certain condition at the start of a collection. Please also check out the TakeWhile method.