In trying:
string var1 = Something";
Console.WriteLine("{0} ... \{", var1);
to get:
Something ...{
I get an error: Unrecognized escape sequence.
Without the backslash I get an error: Input string was not in a correct format.
Using "{0} ... \x7B" doesn't work: Input string was not in a correct format.
(\x78 properly put a "x" there, so the escape sequence for an ASCII character value in hex works, a bit anyway...)
I have spent some time now looking around, but this little tidbit just does not seem to be covered...