Newline character in stringbuilder C# and Javascript

First Try this

 StringBuilder sb = new StringBuilder();
 sb.append("</br>");

or



I would make use of Environment.NewLine Property


Something like
StringBuilder sb = new StringBuilder();
sb.AppendFormat("Foo{0}Bar", Environment.NewLine);
string s = sb.ToString();
Or
StringBuilder sb = new StringBuilder();
sb.Append("Foo");
sb.Append("Foo2");
sb.Append(Environment.NewLine);
sb.Append("Bar");
string s = sb.ToString();

JavaScript
boolean first = true;
StringBuilder builder = new StringBuilder();

for (Map.Entry<MyClass.Key,String> entry : data.entrySet()) {
    if (first) {
        first = false;
    } else {
        builder.append("\n"); // Or whatever break you want
    }
    builder.append(entry.key())
           .append(": ")