C# `String.Concat()`: Efficient String Concatenation

Master string manipulation in C# with the versatile `String.Concat()` method. This tutorial explores its various overloads, demonstrating how to efficiently combine strings and objects into a single string. Learn different ways to concatenate strings in C#.

Understanding C#'s `String.Concat()` Method

The C# `String.Concat()` method combines multiple strings into a single string. It's a fundamental string manipulation function offering several overloads for flexibility.

`String.Concat()` Method Overloads

The `Concat()` method is overloaded, meaning it has multiple versions with different parameter types. This allows you to concatenate various combinations of strings and objects.

Here are some of the common overloads:

• public static string Concat(string str1, string str2): Concatenates two strings.
• public static string Concat(params string[] values): Concatenates an array of strings.
• public static string Concat(params object[] args): Concatenates an array of objects (objects are converted to their string representations).
• public static string Concat(IEnumerable<string> values): Concatenates a collection of strings.

Parameters and Return Value

The parameters depend on the overload used, but they generally involve one or more strings or objects. The return value is always a new string that is the result of concatenating all the input strings or string representations of the objects.

Example: Concatenating Strings

string str1 = "Hello";
string str2 = "World";
string combined = string.Concat(str1, " ", str2); // Output: Hello World
Console.WriteLine(combined);