[Solved] C# String.Format on stream reader [closed]

Question

Your html input line contained characters that are not allowed as String.Format() arguments or you have another { or } in your input. For example, if input string will have something like “Name={0} value={1}” and you use String.Format() passing only 1 value – you will get an exception.

One of solutions to use something more unique as replacement template, for example %%FirstName%% and use String.Replace instead.

var replaced = html.Replace("%%FirstName%%", firstName);

Accepted Answer

Your html input line contained characters that are not allowed as String.Format() arguments or you have another { or } in your input. For example, if input string will have something like “Name={0} value={1}” and you use String.Format() passing only 1 value – you will get an exception.

One of solutions to use something more unique as replacement template, for example %%FirstName%% and use String.Replace instead.

var replaced = html.Replace("%%FirstName%%", firstName);