How can we prepend strings with StringBuilder?

Question

I know we can append strings using StringBuilder. Is there a way we can prepend strings (i.e. add strings in front of a string) using StringBuilder

Answer 1

You could create an extension for StringBuilder yourself with a simple class:

namespace Application.Code.Helpers
{
    public static class StringBuilderExtensions
    {
        #region Methods

        public static void Prepend(this StringBuilder sb, string value)
        {
            sb.Insert(0, value);
        }

        public static void PrependLine(this StringBuilder sb, string value)
        {
            sb.Insert(0, value + Environment.NewLine);
        }

        #endregion
    }
}

Then, just add:

using Application.Code.Helpers;

To the top of any class that you want to use the StringBuilder in and any time you use intelli-sense with a StringBuilder variable, the Prepend and PrependLine methods will show up. Just remember that when you use Prepend, you will need to Prepend in reverse order than if you were Appending.