In this blog post, we will see how we can reverse a string in C#.

Reversing a string can be used in a few different scenarios. One of the use case can be an interview question.

 

 

 

 

Reverse A String In C# Using Array.Reverse() Method

This will be the fastest and the best way to reverse a string in C#.

In this method, we convert a string that needs to be reversed into a char array.

Using this char array, we use the Array.Reverse() method and supply the char array to this method as a parameter.

We then get a char array which is now in reverse.

The final step is to join this char array back to a string. We do that using a new string() method and pass the char array to it.

Let's have a look at the code example:

 

Example:

namespace ConsoleApp3 { public class Program { public static void Main() { string sample = "This is a string"; char[] charArray = sample.ToCharArray(); Array.Reverse(charArray); string reverseString = new string(charArray); Console.WriteLine(reverseString); } } }

 

Result:

gnirts a si sihT

 

 

Reverse A String In C# Using For Loop

Although the above method is the fastest and the best method to reverse a string in C#, there can be a few other methods as well.

One of them can be to use a for loop instead.

Let's see this in a code example.

 

Example:

namespace ConsoleApp3 { public class Program { public static void Main() { string sample = "This is a string"; char[] charArray = sample.ToCharArray(); for (int i = 0, j = charArray.Length - 1; i < j; i++, j--) { charArray[i] = sample[j]; charArray[j] = sample[i]; } string reverseString = new string(charArray); Console.WriteLine(reverseString); } } }

 

Result:

gnirts a si sihT