.NET 4.0 New Feature - String.Join

namespace ConsoleApplication1 { class Program { static void Main(string[] args) { String[] stringCollection = { “123”, “456”, “789” }; int[] intCollection = { 123, 456, 789 }; Object[] objCollection = { 123, “456”, 789.0f }; float[] floatCollection = { 123.0f, 456.0f, 789.0f };

        ShowValue<String>("stringCollection", stringCollection);
        ShowValue<int>("intCollection", intCollection);
        ShowValue<Object>("objCollection", objCollection);
        ShowValue<float>("floatCollection", floatCollection);
    }

    static void ShowValue<T>(string title, IEnumerable<T> values)
    {
        Console.WriteLine("{0}: {1}", title, string.Join(",", values));
    }
}

}

namespace ConsoleApplication1 { class Program { static void Main(string[] args) { String[] stringCollection = { “123”, “456”, “789” }; int[] intCollection = { 123, 456, 789 }; Object[] objCollection = { 123, “456”, 789.0f }; float[] floatCollection = { 123.0f, 456.0f, 789.0f };

        Console.WriteLine("{0}: {1}", "stringCollection", stringCollection.Join(","));
        Console.WriteLine("{0}: {1}", "intCollection", intCollection.Join(","));
        Console.WriteLine("{0}: {1}", "objCollection", objCollection.Join(","));
        Console.WriteLine("{0}: {1}", "floatCollection", floatCollection.Join(","));
    }
}

public static class IEnumerableExtension
{
    public static string Join<T>(this IEnumerable<T> obj, string seperator)
    {
        return string.Join(seperator, obj);
    }
}

}

• CSharp