How do I define a generic class that implements an interface and constrains the type parameter?
C#GenericsInheritanceConstraintsC# Problem Overview
class Sample<T> : IDisposable // case A
{
public void Dispose()
{
throw new NotImplementedException();
}
}
class SampleB<T> where T : IDisposable // case B
{
}
class SampleC<T> : IDisposable, T : IDisposable // case C
{
public void Dispose()
{
throw new NotImplementedException();
}
}
Case C is the combination of case A and case B. Is that possible? How to make case C right?
C# Solutions
Solution 1 - C#
First the implemented interfaces, then the generic type constraints separated by where
:
class SampleC<T> : IDisposable where T : IDisposable // case C
{ // ↑
public void Dispose()
{
throw new NotImplementedException();
}
}
Solution 2 - C#
class SampleC<T> : IDisposable where T : IDisposable // case C
{
public void Dispose()
{
throw new NotImplementedException();
}
}
Solution 3 - C#
You can do it like this:
public class CommonModel<T> : BaseModel<T>, IMessage where T : ModelClass
Solution 4 - C#
class SampleC<T> : IDisposable where T : IDisposable
{
...
}