Concatenate strings in C#

This post will discuss how to concatenate strings in C#.

1. String concatenation using (+)

String concatenation in C# is done using the + operator. We can use this for concatenating two or three strings.

using System;

public class Example

{

public static void Main()

{

string x = "Hello";

string y = "World";

string concat = x + y;

Console.WriteLine(concat);

}

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2. Using `String.Concat()` method

A simple and fairly efficient solution to concatenate two or more strings using the String.Concat() method.

using System;

public class Example

{

public static void Main()

{

string x = "Hello";

string y = "World";

string concat = String.Concat(x, y);

Console.WriteLine(concat);

}

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3. Using `StringBuilder.Append()` method

StringBuilder.Append method can be used to append multiple strings effectively. This is a preferred solution over the + operator for concatenating more than three strings.

using System;

using System.Text;

public class Example

{

public static void Main()

{

string x = "Hello";

string y = "World";

string concat = new StringBuilder().Append(x).Append(y).ToString();

Console.WriteLine(concat);

}

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4. Using `String.Join()` method

The following code example demonstrates how to use the String.Join() method for concatenating multiple strings using an empty string as a separator.

using System;

public class Example

{

public static void Main()

{

string x = "Hello";

string y = "World";

string concat = String.Join(String.Empty, new string[] { x, y });

Console.WriteLine(concat);

}

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5. Using `String.Format()` method

One can use String.Format() method for concatenating multiple strings with one another, as shown below:

using System;

public class Example

{

public static void Main()

{

string x = "Hello";

string y = "World";

string concat = String.Format("{0}{1}", x, y);

Console.WriteLine(concat);

}

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6. String Interpolation

Starting with C# 6, one can use String interpolation ($), which provides a convenient syntax for converting an integer to a string.

using System;

public class Example

{

public static void Main()

{

string x = "Hello";

string y = "World";

string concat = $"{x}{y}";

Console.WriteLine(concat);

}

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That’s all about concatenating strings in C#.

1. String concatenation using (+)

2. Using String.Concat() method

3. Using StringBuilder.Append() method

4. Using String.Join() method

5. Using String.Format() method

6. String Interpolation

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2. Using `String.Concat()` method

3. Using `StringBuilder.Append()` method

4. Using `String.Join()` method

5. Using `String.Format()` method