C# How to Convert List to String in C#| C# Examples

List stores collection of elements of the same type. Types can be inbuilt or custom-type classes.

The list is a data structure that stores the elements in insertion order, Elements are not sorted.

This tutorial explains to Convert a List of Strings into a string separated by a delimiter such as a comma.

How to Convert a List of Strings into a comma delimiter String

Multiple ways we can convert List into comma separated String

The list can be created using the IList or IEnumerable interface

    IList<string> numbers = new List<string>{"one","two","three"}; // .NET 4 version
    IEnumerable<string> strEnumerable= new List<string>{"one","two","three"}; // Less than .NET 4 Version

use string.join method

string.join method takes a separator and enumerable object such as List and returns a string of separator delimited strings.


public static string Join<T>(string separator, IEnumerable<T> values)

Here is an example

using System;
using System.Collections.Generic;

public class Program {
  public static void Main() {
    IList<string> numbers = new List<string>{"one","two","three"};
    string str = string.Join(",", numbers);
    Console.WriteLine(str); // one two three

  }
}

The same above method works with IEnumerables

IEnumerable<string> strEnumerable= new List<string>{"one","two","three"};

    string str1 = string.Join(",", strEnumerable);
        Console.WriteLine(str1); // one two three
  }

use the StringBuilder AppendJoin method AppendJoin() method in StringBuilder takes separator and List and returns comma-separated string

using System;
using System.Collections.Generic;
using System.Text;

public class Program {
  public static void Main() {
    IList<string> numbers = new List<string>{"one","two","three"};
    string str = string.Join(",", numbers);
   var result= new StringBuilder().AppendJoin(", ", numbers).ToString();

    Console.WriteLine(result); // one two three

  }
}

Above two methods works with IList and IEnumerables