This question already has answers here: Closed 12 years ago. Possible Duplicates: Why isn't there generic variance for classes 开发者_运维技巧in C# 4.0?
I use: EntityFramework + POCO Here is the thing: public interface IBaseType { int Id { get; set; } } public class BaseType : IBaseType
I added a covariant interface to our project: interface IView { } interface IPresenter<out TView> where TView : IView
I often forget if i have to use in or out when defining covarient and contravarient generic types. In java i have the mnemonic PECS (producer extends consumer super) to help me. Do you know a similar
Before C# 4.0 came out, I was quite excited about covariance and contravariance. It pandered to my fondness for theoretical correctness!
I\'m trying to override a property in a base class with a different, but derived type with the same name. I think its possible by covarience or generics but am not sure how to do it?
Is this a limitation of the CLR or are there compatibility concerns with existing code? Is this related to the messed up variance of delegate combining in C# 4.0?
This post contains a lot of code, but I would really appreciate it if you took the some to read and understand it...and hopefully come up with a solution
In the CLR via c# third edition there is an example that I cant seem to make sense of: Invariant Meaning that that generic
Input : random vector X=xi, i=1..n. vector of means for X=meanxi, i=1..n 开发者_C百科 Output : covariance matrix Sigma (n*n).
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