How to Split String by String in C#

1. Using the String.Split() Method in C#
2. Using the Regex.Split() Method in C#

Strings are the object used to store textual data. The C# System.String library provides numerous methods for manipulating, creating, and comparing strings.

One common situation we often come across is splitting a string to extract some important data. This article will focus on splitting a string using another string and different ways of performing this operation in C#.

Using the String.Split() Method in C#

The String.Split() method has different overloads providing us with different methods of splitting a string.

We are interested in one particular overload which takes a string as an argument and uses it as a delimiter to split the given string into its substrings.

using System;

public class Example {
  public static void Main() {
    string str = "Delft@@Stack";
    string separator = "@@";

    string[] tokens = str.Split(new string[] { separator }, StringSplitOptions.None);
    Console.WriteLine(String.Join(" ", tokens));
  }
}

Output:

Delft Stack

In the above method, we split the given string using the delimiter string @@ into an array of substrings and then print by concatenating them with a space.

Using the Regex.Split() Method in C#

The Regex.Split() method does what we want to achieve. It takes the input string and splits it into an array of substrings based on the regex condition match.

using System;
using System.Text.RegularExpressions;

public class Program {
  public static void Main() {
    string str = "Delft@@Stack";
    string separator = "@@";

    string[] tokens = Regex.Split(str, separator);
    Console.WriteLine(String.Join(" ", tokens));
  }
}

Output:

Delft Stack

As from the code sample above, the Regex.Split() method has an even simpler usage than the String.Split() method. It is even faster and more efficient in execution.