How to convert IEnumerable<string> to one comma separated string in C#?

How to convert IEnumerable<string> to one comma separated string in C#?

You can convert an IEnumerable<string> to a single comma-separated string in C# using the string.Join method. The string.Join method concatenates the elements of a collection, separated by a specified separator (in this case, a comma ,) and returns a single string.

Here's how you can do it:

using System; using System.Collections.Generic; public class Program { public static void Main() { IEnumerable<string> stringList = new List<string> { "Apple", "Banana", "Orange", "Grapes" }; // Convert IEnumerable<string> to a comma-separated string string result = string.Join(",", stringList); Console.WriteLine(result); // Output: "Apple,Banana,Orange,Grapes" } }

In this example, we have an IEnumerable<string> named stringList containing some fruit names. We use string.Join(",", stringList) to concatenate the elements of stringList into a single string, separated by commas.

Note that string.Join is available in C# 4.0 and later versions. If you are using an earlier version, you can use string.Join overloads that take an array of strings as an argument instead of an IEnumerable<string>. For example:

string result = string.Join(",", stringList.ToArray());

However, using the version that directly accepts IEnumerable<string> is more efficient, as it avoids the need to convert the collection to an array explicitly.

Examples

  1. "C# convert IEnumerable<string> to comma-separated string" Description: Learn how to convert an IEnumerable<string> collection into a single string separated by commas in C#.

    using System; using System.Collections.Generic; using System.Linq; class Program { static void Main(string[] args) { IEnumerable<string> strings = new List<string> { "one", "two", "three" }; string result = string.Join(", ", strings); Console.WriteLine(result); } }

  2. "C# concatenate IEnumerable<string> with commas" Description: Concatenate a collection of strings with commas in C#.

    using System; using System.Collections.Generic; using System.Linq; class Program { static void Main(string[] args) { IEnumerable<string> strings = new List<string> { "one", "two", "three" }; string result = string.Join(", ", strings); Console.WriteLine(result); } }

  3. "C# join IEnumerable<string> to comma-separated string" Description: How to join an IEnumerable<string> into a single string separated by commas in C#.

    using System; using System.Collections.Generic; using System.Linq; class Program { static void Main(string[] args) { IEnumerable<string> strings = new List<string> { "one", "two", "three" }; string result = string.Join(", ", strings); Console.WriteLine(result); } }

  4. "C# convert IEnumerable<string> to CSV string" Description: Convert IEnumerable<string> elements into a comma-separated values (CSV) string in C#.

    using System; using System.Collections.Generic; using System.Linq; class Program { static void Main(string[] args) { IEnumerable<string> strings = new List<string> { "one", "two", "three" }; string result = string.Join(", ", strings); Console.WriteLine(result); } }

  5. "C# convert IEnumerable<string> to delimited string" Description: Convert an IEnumerable<string> collection to a string delimited by a specified character (comma, in this case) in C#.

    using System; using System.Collections.Generic; using System.Linq; class Program { static void Main(string[] args) { IEnumerable<string> strings = new List<string> { "one", "two", "three" }; string result = string.Join(", ", strings); Console.WriteLine(result); } }

  6. "C# convert IEnumerable<string> to comma-separated string with LINQ" Description: Use LINQ to convert an IEnumerable<string> to a comma-separated string in C#.

    using System; using System.Collections.Generic; using System.Linq; class Program { static void Main(string[] args) { IEnumerable<string> strings = new List<string> { "one", "two", "three" }; string result = string.Join(", ", strings); Console.WriteLine(result); } }

  7. "C# IEnumerable<string> to comma-separated string without loop" Description: Convert IEnumerable<string> to a comma-separated string in C# without using loops.

    using System; using System.Collections.Generic; using System.Linq; class Program { static void Main(string[] args) { IEnumerable<string> strings = new List<string> { "one", "two", "three" }; string result = string.Join(", ", strings); Console.WriteLine(result); } }

  8. "C# join IEnumerable<string> without foreach loop" Description: How to join elements of an IEnumerable<string> without using a foreach loop in C#.

    using System; using System.Collections.Generic; using System.Linq; class Program { static void Main(string[] args) { IEnumerable<string> strings = new List<string> { "one", "two", "three" }; string result = string.Join(", ", strings); Console.WriteLine(result); } }

  9. "C# concatenate IEnumerable<string> efficiently" Description: Efficiently concatenate elements of an IEnumerable<string> into a single comma-separated string in C#.

    using System; using System.Collections.Generic; using System.Linq; class Program { static void Main(string[] args) { IEnumerable<string> strings = new List<string> { "one", "two", "three" }; string result = string.Join(", ", strings); Console.WriteLine(result); } }

  10. "C# IEnumerable<string> to CSV without loop" Description: Convert IEnumerable<string> to a comma-separated string (CSV) in C# without using loops.

    using System; using System.Collections.Generic; using System.Linq; class Program { static void Main(string[] args) { IEnumerable<string> strings = new List<string> { "one", "two", "three" }; string result = string.Join(", ", strings); Console.WriteLine(result); } }

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