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C# String Join() method

C# String Join() method for beginners and professionals with examples on overloading, method overriding, inheritance, aggregation, base, polymorphism, sealed, abstract, interface, namespaces, exception handling, file io, collections, multithreading, reflection etc.

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C# String Join()

The C# Join() methods is used to concatenate the elements of an array, using the specified separator between each element. It returns a modified string.

Signature

[ComVisibleAttribute(false)]
public static string Join(String first, params String[] second)
[ComVisibleAttribute(false)] 
public static string Joint(String, params Object[])
[ComVisibleAttribute(false)]
public static string Join (String, IEnumerable<String>)
[ComVisibleAttribute(false)]
public static string Join(String, String[], Int32, Int32)
[ComVisibleAttribute(false)]
public static string Join<T>(String, IEnumerable <T>)

Parameter

first: it is a string type parameter.

second: it is a string array.

Return

It returns a string.


C# String Join() Method Example

using System; 
    public class StringExample  
    {  
        public static void Main(string[] args)  
        {  
           string[] s1 = {"Hello","C#","by","TheDeveloperBlog"};
           string s3 = string.Join("-",s1);
           Console.WriteLine(s3);
       }  
    }  

Output:

Hello-C#-by-TheDeveloperBlog




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