How to escape double curly bracket in string.Format()

Question

I have already seen from other answers that to escape the { or } char in C# string.Format() you use {{ or }}.

But what I need to do is format a string that looks like this:

{{tag}}

However, when I try to escape the double curly braces like this:

string.Format("{{{0}}}", "tag");

or this:

string.Format("{{{{{0}}}}}", "tag");

The output is always this:

{tag}

A different way I have found that works is:

StringBuilder output = new StringBuilder();

output.Append("{{");
output.Append("tag");
output.Append("}}");

But it seems silly to have to have all that just to format a string.

Am I missing something obvious?

Answer 1

In order to do this you need 5 braces on either side of the expression

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

The break down is

• 2 for the first {
• 2 for the second {
• 1 for the first { in {0}