The translation performed by the EventSource manifest generator is
{0} -> %1
...
{n} -> %(n+1)
& -> &
< -> <
> -> >
' -> '
" -> "
For reference, the conversion happens in string EventProviderBase.TranslateToManifestConvention(string)
.
Then you end up at the message compiler. Escapes are as follows:
%n[!format_specifier!] Describes an insert. Each insert is an entry in the
Arguments array in the FormatMessage function. The value of n can be a number
between 1 and 99. The format specifier is optional. If no value is specified,
the default is !s!. For information about the format specifier, see wsprintf.
The format specifier can use * for either the precision or the width. When
specified, they consume inserts numbered n+1 and n+2.
%0 Terminates a message text line without a trailing newline character. This can
be used to build a long line or terminate a prompt message without a trailing
newline character.
%. Generates a single period. This can be used to display a period at the
beginning of a line, which would otherwise terminate the message text.
%! Generates a single exclamation point. This can be used to specify an
exclamation point immediately after an insert.
%% Generates a single percent sign.
%n Generates a hard line break when it occurs at the end of a line. This can be
used with FormatMessage to ensure that the message fits a certain width.
%b Generates a space character. This can be used to ensure an appropriate number
of trailing spaces on a line.
%r Generates a hard carriage return without a trailing newline character.