I think that C# newbie List<Interface> question is a duplicate, but not a duplicate of Why is this cast not possible?.

They are both "why doesn't variance work the way I'd like it to work in C#" duplicates. However, "newbie" is so much simpler that, if it were not a duplicate of many others, it would deserve to stand on its own.

The problem will be finding the other duplicates. The following are from the first page of http://stackoverflow.com/search?q=contravariance+interface+c%23+list+generic. There are ten pages:

• In C#, why can't a List<string> object be stored in a List<object> variable
• Why can't List<parent> = List<child>?
• How to make a generic class with inheritance? (EL)
• C# : Is Variance (Covariance / Contravariance) another word for Polymorphism?
• Upcasting and generic lists

BTW, I chose "contravariance" in the above search because I thought there would be fewer occurrences of that word than of "covariance". There were ten pages of each.

I think that C# newbie List<Interface> question is a duplicate, but not a duplicate of Why is this cast not possible?.

They are both "why doesn't variance work the way I'd like it to work in C#" duplicates. However, "newbie" is so much simpler that, if it were not a duplicate of many others, it would deserve to stand on its own.

The problem will be finding the other duplicates. The following are from the first page of https://stackoverflow.com/search?q=contravariance+interface+c%23+list+generic. There are ten pages:

• In C#, why can't a List<string> object be stored in a List<object> variable
• Why can't List<parent> = List<child>?
• How to make a generic class with inheritance? (EL)
• C# : Is Variance (Covariance / Contravariance) another word for Polymorphism?
• Upcasting and generic lists

BTW, I chose "contravariance" in the above search because I thought there would be fewer occurrences of that word than of "covariance". There were ten pages of each.

I think that C# newbie List<Interface> question is a duplicate, but not a duplicate of Why is this cast not possible?.

They are both "why doesn't variance work the way I'd like it to work in C#" duplicates. However, "newbie" is so much simpler that, if it were not a duplicate of many others, it would deserve to stand on its own.

The problem will be finding the other duplicates.

I think that C# newbie List<Interface> question is a duplicate, but not a duplicate of Why is this cast not possible?.

They are both "why doesn't variance work the way I'd like it to work in C#" duplicates. However, "newbie" is so much simpler that, if it were not a duplicate of many others, it would deserve to stand on its own.

The problem will be finding the other duplicates. The following are from the first page of http://stackoverflow.com/search?q=contravariance+interface+c%23+list+generic. There are ten pages:

• In C#, why can't a List<string> object be stored in a List<object> variable
• Why can't List<parent> = List<child>?
• How to make a generic class with inheritance? (EL)
• C# : Is Variance (Covariance / Contravariance) another word for Polymorphism?
• Upcasting and generic lists

BTW, I chose "contravariance" in the above search because I thought there would be fewer occurrences of that word than of "covariance". There were ten pages of each.