.net

问题 This question already has answers here : Why use generic constraints in C# (7 answers) Closed 6 months ago . I've been reading on leveraging generic constraints, I've found that generics can be constrained to struct , class , new , Class and Interface . The reasons behind the first three are pretty obvious. But I can't really understand why and when to constraint to a class. i.e class Foo<T> where T : Bar class Foo<T> where T : IBar This allows us to constrain to Bar and it's children, and

问题 This question already has answers here : Why use generic constraints in C# (7 answers) Closed 6 months ago . I've been reading on leveraging generic constraints, I've found that generics can be constrained to struct , class , new , Class and Interface . The reasons behind the first three are pretty obvious. But I can't really understand why and when to constraint to a class. i.e class Foo<T> where T : Bar class Foo<T> where T : IBar This allows us to constrain to Bar and it's children, and

问题 Note: This is a Visual Studio 2015 feature only, as far as I know... How can I edit the Implement interface with Disposable Pattern option? This is NOT a question on how to Implement the Dispose Pattern and its variations, but how to edit the option "Implement interface with Disposable Pattern" I would like to remove some comments and add some code on the Disposable Pattern, but I want it to be saved and every time I click " Implement interface with Disposable Pattern ", it implements my code

问题 Note: This is a Visual Studio 2015 feature only, as far as I know... How can I edit the Implement interface with Disposable Pattern option? This is NOT a question on how to Implement the Dispose Pattern and its variations, but how to edit the option "Implement interface with Disposable Pattern" I would like to remove some comments and add some code on the Disposable Pattern, but I want it to be saved and every time I click " Implement interface with Disposable Pattern ", it implements my code

问题 I'm wondering if it is possible somehow locate popup of ToolTip outside of application form in the fixed point over the empty desktop with MouseHover event, of course if event is useful for ToolTip, not sure. Or any other way if it is possible I'm not asking for how to display another form as an option for this goal. 回答1: You can use either of these options: Handle showing and hiding the ToolTip yourself. You can use MouseHover show the ToolTip in desired location and using MouseLeave hide it

问题 I'm wondering if it is possible somehow locate popup of ToolTip outside of application form in the fixed point over the empty desktop with MouseHover event, of course if event is useful for ToolTip, not sure. Or any other way if it is possible I'm not asking for how to display another form as an option for this goal. 回答1: You can use either of these options: Handle showing and hiding the ToolTip yourself. You can use MouseHover show the ToolTip in desired location and using MouseLeave hide it

问题 I have a simple problem with an animated binded property. Here is a simple example to illustrate it : ViewModel : public class ViewModel { private double myProperty; public double MyProperty { get { return myProperty; } set { myProperty = value; /* Break point here */ } } public ViewModel() { MyProperty = 20; } } MyControl : public class MyControl : Button { protected override void OnClick() { base.OnClick(); Height = ActualHeight + 20; } } MyAnimatedControl : public class MyAnimatedControl :

问题 I have an application that runs continuously, it creates and destroys classes some of which have events like mouse click events and the like... First question is what is the proper way to unsubscribe? If the subscribe looks like this: Panel1.MouseClick += new MouseEventHandler(Action_MouseClick); is it proper to unsubscribe like this: Panel1.MouseClick -= new MouseEventHandler(Action_MouseClick); OR is it ok to do this: Panel1.MouseClick -= Action_MouseClick; or is either way ok? My other

问题 I have an application that runs continuously, it creates and destroys classes some of which have events like mouse click events and the like... First question is what is the proper way to unsubscribe? If the subscribe looks like this: Panel1.MouseClick += new MouseEventHandler(Action_MouseClick); is it proper to unsubscribe like this: Panel1.MouseClick -= new MouseEventHandler(Action_MouseClick); OR is it ok to do this: Panel1.MouseClick -= Action_MouseClick; or is either way ok? My other

问题 The documentation of the lock statement is pretty straightforward: lock (x) { // Your code... } where x is an expression of a reference type . So I should not be allowed to pass a value type as locker for a lock . I noticed though that I can use a value type that implements an interface. In other words I can do this: IDisposable locker = default(DisposableStruct); lock (locker) Console.WriteLine("Thread safe"); struct DisposableStruct : IDisposable { public void Dispose() { } } This was