Allow comparing via overloaded equality operator

[nothrow]

Hello,

I have some struct-wrapping-integer acting as ID. I have overloaded equality operators between my object and integer, and implicit casts between my struct as integer.

I've seen in code that for struct, implicit casts are ignored, and there is no overloaded equality operator usage support, even if Expression.Equal works with it (https://docs.microsoft.com/en-us/dotnet/api/system.linq.expressions.expression.equal?view=netframework-4.8).

If the Type property of either left or right represents a user-defined type that overloads the equality operator, the MethodInfo that represents that method is the implementing method.

Would it be possible to implement such a support?

[nothrow]

I also propose PR with solution.