Type.GetProperties different properties between Collection and ICollection

Question

I am try to build an expression tree and I have this code

 var param = Expression.Parameter(typeof(T), "Foo");
 var property = Expression.Property(param, "Bar");
 var param2 = Expression.Parameter(property.Type.GetProperty("Item").PropertyType, "x");

Now, Bar is a Collection property of Foo and I declare it as

public Collection<Bar> Bar {get;set;}

I am able to get the Item property once I call the Type.GetProperty

The problem I'm facing now is that the Entity class is autogenerated and it is declared as

public ICollection<Bar> Bar {get;set;}

Once I call the Type.GetProperty on ICollection, the Item property is missing.

Is there a way to get that even when using Interface (e.g. ICollection) since I cannot change the type of the properties of the class. Any help is appreciated.

Answer 1

Ok I got it now.

var converted = Expression.Convert(property, typeof(Collection<Bar>));
var param2 = Expression.Parameter(converted.Type.GetProperty("Item").PropertyType, "x");

I just need to convert the property type so I can access that property.