Add formatted string to StringBuilder : StringBuilder « String « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. String
3. StringBuilder

using System;
using System.Text;

class MainClass
{
    public static void Main()
    {
        StringBuilder sb = new StringBuilder();
        int number = 1;

        sb.AppendFormat("{0}: {1} ", number++, "another string");

        Console.WriteLine("{0}", sb);
    }
}

1: another string