Caliburn.Micro HelloScreens 示例构建错误

Question

当我尝试从 http://caliburnmicro.codeplex.com 构建 Caliburn.Micro 示例项目“Caliburn.Micro.HelloScreens”时出现此错误

错误：类型“TDocument”必须是引用类型才能在泛型类型或方法“Caliburn.Micro.Conductor”中用作参数“T”

TDocument 在类 DocumentWorkspace 中定义为

public abstract class DocumentWorkspace<TDocument> : Conductor<TDocument>.Collection.OneActive, IDocumentWorkspace where TDocument : INotifyPropertyChanged, IDeactivate, IHaveDisplayName 
{

Answer 1

抽象中缺少 class 关键字来告诉 DocumentWorkspace TDocument 是派生对象类。试试

public abstract class DocumentWorkspace<TDocument> : Conductor<TDocument>.Collection.OneActive, IDocumentWorkspace where TDocument : class, INotifyPropertyChanged, IDeactivate, IHaveDisplayName { }