.NET StringBuilder preappend a line

Question

I know that the System.Text.StringBuilder in .NET has an AppendLine() method, however, I need to pre-append a line to the beginning of a StringBuilder. I know that you can use Insert() to append a string, but I can't seem to do that with a line, is there a next line character I can use? I am using VB.NET, so answers in that are preferable, but answers in C# are ok as well.

Answer 1

is there a next line character I can use?

You can use Environment.NewLine

Gets the newline string defined for this environment.

For example:

StringBuilder sb = new StringBuilder(); sb.AppendLine("bla bla bla.."); sb.Insert(0, Environment.NewLine); 

Or even better you can write a simple extension method for that:

public static class MyExtensions {     public static StringBuilder Prepend(this StringBuilder sb, string content)     {         return sb.Insert(0, content);     } } 

Then you can use it like this:

StringBuilder sb = new StringBuilder(); sb.AppendLine("bla bla bla.."); sb.Prepend(Environment.NewLine); 

Answer 2

You can use AppendFormat to add a new line where ever you like.

Dim sb As New StringBuilder()
sb.AppendFormat("{0}Foo Bacon", Environment.NewLine)