Is there a way to do dynamic implicit type casting in C#?

Yes, yes you are. To be nit-picky, you should be saying "user-defined implicit conversion" rather than "implicit cast" -- a cast is (almost) always explicit. But your deduction that overload resolution chooses which user-defined conversion to call at compile time and not at run time is correct Is there some other way to do this?

Yes. In C# 4 if you type your "object" as "dynamic" then we start up the compiler again at runtime and re-perform all the analysis on the operands as though their compile-time types were the current run-time types As you might imagine, this is not cheap, though we are very smart about caching and re-using the results should you do this in a tight loop.

Yes, yes you are. To be nit-picky, you should be saying "user-defined implicit conversion" rather than "implicit cast" -- a cast is (almost) always explicit. But your deduction that overload resolution chooses which user-defined conversion to call at compile time and not at run time is correct.

Is there some other way to do this? Yes.In C# 4 if you type your "object" as "dynamic" then we start up the compiler again at runtime and re-perform all the analysis on the operands as though their compile-time types were the current run-time types. As you might imagine, this is not cheap, though we are very smart about caching and re-using the results should you do this in a tight loop.

Adding an explicit operator should work: msdn.microsoft.com/en-us/library/85w54y0...).aspx.

2 This is incorrect. – Eric Lippert Jan 19 '10 at 0:24.

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