How do I cast a generic list to a generic interface

[MBursill]

I have the following interface

public interface IImage
{
string FileName { get; set;}
string Caption { get; set;}
}

I have a class called Image that implements the interface. I create a BindingList of that Image object:

BindingList<Image> images = new BindingList<Image>();

I later want to store images in a list defined as the interface.

BindingList<IImage> = images; // casting error

Why am I getting a casting error? If I understand the rules of polymorphisms correctly, so long as my Image class implements IImage, I can store any Image as an IImage without needing to explicitly cast. What to do? :confused: -Mike.

[Manoj Kumar Rai]

MBursill wrote:

BindingList = images; // casting error Why am I getting a casting error? If I understand the rules of polymorphisms correctly, so long as my Image class implements IImage, I can store any Image as an IImage without needing to explicitly cast.

See, as per polymorphisms you asign a object of the drived class to a base class. But in the above case the "BindingList" is not a base class to the "BindingList", hence you are not able to assign them. Its actually the items they contains have relation of base class - drive class.

Manoj Never Gives up

[leppie]

MBursill wrote:

BindingList images = new BindingList();

Do the following :)

BindingList<IImage> images = new BindingList<IImage>();

**

xacc.ide-0.2.0.57 - now with C# 2.0 parser and seamless VS2005 solution support!

**