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GeneralRe: C# GDI+ simulation of inclined plane Pin
Mycroft Holmes16-Aug-16 14:26
professionalMycroft Holmes16-Aug-16 14:26 
GeneralRe: C# GDI+ simulation of inclined plane Pin
Gerry Schmitz16-Aug-16 6:42
mveGerry Schmitz16-Aug-16 6:42 
AnswerRe: C# GDI+ simulation of inclined plane Pin
Gerry Schmitz16-Aug-16 6:30
mveGerry Schmitz16-Aug-16 6:30 
GeneralRe: C# GDI+ simulation of inclined plane Pin
Member 1268837716-Aug-16 6:40
Member 1268837716-Aug-16 6:40 
AnswerRe: C# GDI+ simulation of inclined plane Pin
patbob18-Aug-16 11:35
patbob18-Aug-16 11:35 
QuestionC#: what is the usage of virtual keyword in Entity Framework Pin
Tridip Bhattacharjee16-Aug-16 2:32
professionalTridip Bhattacharjee16-Aug-16 2:32 
AnswerRe: C#: what is the usage of virtual keyword in Entity Framework Pin
Richard MacCutchan16-Aug-16 3:02
mveRichard MacCutchan16-Aug-16 3:02 
AnswerRe: C#: what is the usage of virtual keyword in Entity Framework Pin
Richard Deeming16-Aug-16 4:57
mveRichard Deeming16-Aug-16 4:57 
In Entity Framework, properties are declared as virtual to allow for change-tracking, and for lazy-loading of related entities. EF dynamically generates a proxy class derived from your POCO class to add these features, and needs to override the properties to do so.
Requirements for Creating POCO Proxies[^]


The CourseId and (incorrectly named) Courses properties are used to define a one-to-many foreign-key relationship to the Course entity:
Entity Framework Relationships & Navigation Properties[^]

The relationship between students and courses doesn't make logical sense - one student can currently only take one course. In a real example, I would expect to see a many-to-many relationship.


The type of a navigation property must implement ICollection<T> to allow for lazy-loading. Whilst you could use IList<T>, it usually doesn't make sense, since the related entities don't have a defined order. (You could also use a concrete type, but it's generally better to stick with an interface.)



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AnswerRe: C#: what is the usage of virtual keyword in Entity Framework Pin
Gerry Schmitz16-Aug-16 6:01
mveGerry Schmitz16-Aug-16 6:01 
QuestionHow to get Windows explorer’s position using C#? Pin
srikrishnathanthri15-Aug-16 22:10
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AnswerRe: How to get Windows explorer’s position using C#? Pin
OriginalGriff15-Aug-16 22:27
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GeneralRe: How to get Windows explorer’s position using C#? Pin
srikrishnathanthri15-Aug-16 23:00
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AnswerRe: How to get Windows explorer’s position using C#? Pin
Richard Deeming16-Aug-16 2:06
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QuestionAutocomplete with any character in TextBox C# Pin
ThabetMicrosoft14-Aug-16 23:21
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AnswerRe: Autocomplete with any character in TextBox C# Pin
Pete O'Hanlon14-Aug-16 23:23
mvePete O'Hanlon14-Aug-16 23:23 
GeneralRe: Autocomplete with any character in TextBox C# Pin
ThabetMicrosoft14-Aug-16 23:35
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GeneralRe: Autocomplete with any character in TextBox C# Pin
Pete O'Hanlon14-Aug-16 23:38
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Questionform java to c# Pin
Sikandar Javid14-Aug-16 19:52
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AnswerRe: form java to c# Pin
Simon_Whale15-Aug-16 0:34
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QuestionAccounting software Pin
cupidanish14-Aug-16 17:25
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AnswerRe: Accounting software Pin
Mycroft Holmes14-Aug-16 17:38
professionalMycroft Holmes14-Aug-16 17:38 
AnswerRe: Accounting software Pin
Richard MacCutchan14-Aug-16 21:17
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AnswerRe: Accounting software Pin
Emmanuel Medina15-Aug-16 9:07
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QuestionFile comparison (byte, hash and meta) in C# Pin
Frank R. Haugen11-Aug-16 11:54
professionalFrank R. Haugen11-Aug-16 11:54 
AnswerRe: File comparison (byte, hash and meta) in C# Pin
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