c# casting to and from interface types with generic types -

i have class mockrepository implements interface irepository , have class technology implements interface iidentifiable.

i want cast object mockrepository<technology> irepository<iidentifiable> , cast again after operations complete. possible? code compiles when try run invalid cast exception.

short answer no.

if have interface imyinterface<t> compiler create new interface each type of t use , substitute values of t.

to give example:

i have interface:

public interface imyinterface<t> {    public t value {get; set;} } 

i have 2 classes:

public class foo {}  public class bar : foo {} 

i define following

public class orange : imyinterface<foo> {}  public class banana : imyinterface<bar> {} 

the compiler automatically create 2 new interfaces using specific name convention, i'm going use different names highlight different

public interface randominterface {    foo value { get; set; } }  public interface alternativeinterface {    bar value { get; set; } }  public class orange : randominterface { }  public class banana : alternativeinterface { } 

as can see there no relationship between randominterface , alternativeinterface. class inheriting randominterface cannot cast alternativeinterface

update after reading question comments

if wish pass mockrepository function expects irepository can following

 public void myfunction<t>(irepository<t> repo) t: iidentifiable {  }