Parser for the Mathematica syntax?

Question

Is there a built parser that I can use from C# that can parse mathematica expressions?

I know that I can use the Kernel itself to parse an expression, and use .NET/Link

Answer 1

I don't think such a thing exists already (I'd love to know about it). But it may be useful that within Mathematica you can apply the function FullForm to any expression and get something very easy to parse, kind of like an s-expression in Lisp. For example,

FullForm[a+b*c]

yields

Plus[a, Times[b,c]]

That's the underlying representation of all Mathematica expressions and should be straightforward to parse.