Iterate StringBuilder in a foreach Loop

Firstly, set a string array and StringBuilder −

// string array
string[] myStr = { "One", "Two", "Three", "Four" };
StringBuilder str = new StringBuilder("We will print now...").AppendLine();

Now, use foreach loop to iterate −

foreach (string item in myStr) {
   str.Append(item).AppendLine();
}

The following is the complete code −

Example

 Live Demo

using System;
using System.Text;

public class Demo {
   public static void Main() {
      // string array
      string[] myStr = { "One", "Two", "Three", "Four" };
      StringBuilder str = new StringBuilder("We will print now...").AppendLine();

      // foreach loop to append elements
      foreach (string item in myStr) {
         str.Append(item).AppendLine();
      }
      Console.WriteLine(str.ToString());
      Console.ReadLine();
   }
}

Output

We will print now...
One
Two
Three
Four