How to append a char at a defined position Languages

How to append a char at a defined position

I'm trying to add a character at a defined position. I've created a new function, allocate a memory for one more char, save characters after the position then added my character at the defined position, and now I don't know how to erase characters after that position to concatenate the...
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Why can't I use @$ prefix before strings? Languages

Why can't I use @$ prefix before strings?

All these string prefixes are legal to use in C#:Why isn't this?One would have thought that the order of these operators doesn't matter, because they have no other meaning in C# but to prefix strings. I cannot think of a situation when this inverted double prefix would not compile. Is...
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