using covariance on an interface …Runtime Error Unable to cast object of type 'derviedAService ' to type 'iBaseService`1[mybase]'

Question

using System; 
using System.Collections.Generic;



namespace mymodels
{
public abstract class mybase
{
     public string v1 {get; set;}
}     


public class derivedA          


        

Answer 1

Your interface isn't covariant - it needs to be explicitly covariant when you declare it. So this:

interface iBaseService<T>  where T : mymodels.mybase

should be:

interface iBaseService<out T>  where T : mymodels.mybase

... except that you should also follow .NET naming conventions, using PascalCase for namespace, type and method names. Your code is very unconventional at the moment.