In C# how can i check if T is of type IInterface and cast to that if my object supports that interface?

Question

In C#, I have a function that passes in T using generics and I want to run a check to see if T is an object that implements a

Answer 1

You don't have to make the FilterMe method a generic method to achieve the same result.

    public class MyModel : IModel where T : MyObjectBase {
        public IQueryable GetRecords()
    {
        var entities = Repository.Query();
        if (typeof(IFilterable).IsAssignableFrom(typeof(T)))
        {
            //Filterme is a method that takes in IEnumerable
            entities = FilterMe(entities.Cast());
        }
        return entities;
    }

        public IEnumerable FilterMe(IEnumerable linked)  {
            var dict = GetDict();
            return linked
                    .Where(r => dict.ContainsKey(r.Id))
                    .Cast();
        }
    }