Something in the likes of IList.IndexOf() but on IEnumerable?

Question

Is there any method / extension method on IEnumerable that allows me to find the index of of an object instance in it? Like IndexOf() in IList?

indexPosition = m         


        

Answer 1

Note that there couldn't be any instance method because IEnumerable is covariant.

Anything of type IEnumerable has to implement IndexOf(string x), and, due to covariance, can be casted to IEnumerable