In this source code example, we will demonstrate the usage of String.Concat() method in C# with an example.

The C# Concat() method is used to concatenate multiple string objects. It returns a concatenated string. 

C# String Concat Method Example

using System;

public class StringDemo
{
    public static void Main(string[] args)
    {
        string s1 = "source";
        string s2 = "code";
        string s3 = "examples";
        
        Console.WriteLine(string.Concat(s1,s2));    
        
        Console.WriteLine(string.Concat( string.Concat(s1, s2), s3));    

    }

}

Output:

sourcecode
sourcecodeexamples

C# String Concat(String[]) Method Example

String Concat() method concatenates the elements of a specified String array.

The following example demonstrates the use of the Concat method with a String array.

using System;

public class StringDemo
{
    public static void Main(string[] args)
    {
        // Make an array of strings. Note that we have included spaces.
        string [] s = { "hello ", "and ", "welcome ", "to ",
                        "this ", "demo! " };

        // Put all the strings together.
        Console.WriteLine(string.Concat(s));

        // Sort the strings, and put them together.
        Array.Sort(s);
        
        Console.WriteLine(string.Concat(s));
    }

}

Output:

hello and welcome to this demo! 
and demo! hello this to welcome 

Related C# String Examples

1. C# String Clone Method Example
2. C# String Compare Method Example
3. C# String CompareTo Method Example
4. C# String Concat Method Example
5. C# String Contains Method Example
6. C# String Copy Method Example
7. C# String CopyTo Method Example
8. C# String EndsWith Method Example
9. C# String Equals Method Example
10. C# String GetEnumerator Method Example
11. C# String GetHashCode Method Example
12. C# String IndexOf Method Example
13. C# String Insert Method Example
14. C# String Intern Method Example
15. C# String IsNullOrEmpty Method Example
16. C# String IsNullOrWhiteSpace Method Example
17. C# String LastIndexOf Method Example