Get a slice or a sublist of a List in C#

This post will discuss how to get a slice or a sublist of a list in C#.

1. Using `GetRange()` Method

The recommended solution to get a copy of the source list between the specified range is using the List<T>.GetRange() method. The following example demonstrates how you can use the GetRange() method to get a sublist of a list.

using System;

using System.Collections.Generic;

public class Example

{

public static void Main()

{

List<int> values = new List<int>() { 1, 2, 3, 4, 5 };

int start = 1;

int end = 3;

List<int> subList = values.GetRange(start, end);

Console.WriteLine(String.Join(", ", subList)); // 2, 3, 4

}

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If you need to delete the range of items from the source list, use the List<T>.RemoveAt(Int32) method that takes the index of the List<T> and remove the element at that index.

using System;

using System.Collections.Generic;

public class Example

{

public static void Main()

{

List<int> values = new List<int>() { 1, 2, 3, 4, 5 };

int start = 1;

int end = 3;

for (int index = end; index >= start; index--) {

values.RemoveAt(index);

}

Console.WriteLine(String.Join(", ", values)); // 1, 5

}

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2. Using `Where()` Method

With LINQ, you can use the Where() method to filters a sequence of values based on a predicate. The following code example demonstrates how you can use the Where() method to get a slice of a list in C#.

using System;

using System.Linq;

using System.Collections.Generic;

public class Example

{

public static void Main()

{

List<int> values = new List<int>() { 1, 2, 3, 4, 5 };

int start = 1;

int end = 3;

List<int> subList = values.Where((value, index) => index >= start && index <= end)

.ToList();

Console.WriteLine(String.Join(", ", subList)); // 2, 3, 4

}

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That’s all about getting a slice or a sublist of a list in C#.

Get a slice or a sublist of a List in C#

1. Using GetRange() Method

2. Using Where() Method

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1. Using `GetRange()` Method

2. Using `Where()` Method