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Khalid Abuhakmeh logo Khalid Abuhakmeh

Tip #011

string.Join

.NET Framework 4

Code card: string.Join. Program output: John, Paul, George, Ringo / 1 + 4 + 9 + 16

About this tip

string.Join takes any separator and any IEnumerable<T>, including LINQ results. It is available since .NET Framework 4. The key line is Console.WriteLine(string.Join(", ", band)) in join.cs. Run it and the output reads John, Paul, George, Ringo, 1 + 4 + 9 + 16.

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Code

join.cs
string[] band = ["John", "Paul", "George", "Ringo"];


Console.WriteLine(string.Join(", ", band));


var sq = Enumerable.Range(1, 4).Select(n => n * n);
Console.WriteLine(string.Join(" + ", sq));

Output

Output
$ dotnet run join.cs
John, Paul, George, Ringo
1 + 4 + 9 + 16