Remove empty strings from a List in C#

This post will discuss how to remove empty strings from a List in C#.

The List<T>.RemoveAll() method removes all the elements from a list that match the conditions defined by the specified predicate. The following code demonstrates the usage of List’s RemoveAll() method to in-place remove empty strings from a list and maintain the order of elements.

using System;

using System.Collections.Generic;

public class Example

{

public static void Main()

{

List<string> strings = new List<string>() { "A", "", "B", "", "C", "" };

strings.RemoveAll(s => s == "");

Console.WriteLine(String.Join(", ", strings)); // A, B, C

}

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To check whether the specified string is null or empty, use the String.IsNullOrEmpty() convenience method.

using System;

using System.Collections.Generic;

public class Example

{

public static void Main()

{

List<string> strings = new List<string>() { "A", "", "B", null, "C", "" };

strings.RemoveAll(s => string.IsNullOrEmpty(s));

Console.WriteLine(String.Join(", ", strings)); // A, B, C

}

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To additionally check for the specified string consists of only white-space characters, use String.IsNullOrWhiteSpace() convenience method.

using System;

using System.Collections.Generic;

public class Example

{

public static void Main()

{

List<string> strings = new List<string>() { "A", "", "B", null, "C", "" };

strings.RemoveAll(s => string.IsNullOrWhiteSpace(s));

Console.WriteLine(String.Join(", ", strings)); // A, B, C

}

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That’s all about removing empty strings from a List in C#.

Remove empty strings from a List in C#

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