C# generic method with integer constraint refuses to cast from integer to the generic type

Question

If I have a generic method that is constrained to be type \'int\' then surely I should be able to cast an integer to the generic T type. For example...

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Answer 1

int (and all other numeric types, and enums) cannot be used as a generic constraint.

See

Generic C# Code and the Plus Operator

for further details and options.

For a discussion with Anders Hejlsberg, the creator of C#, about generics and type constraints see

http://www.artima.com/intv/generics.html

One can place a type constraint of struct like this:

public class Generic where T : struct { }

Generic gen = new Generic();