Question

In C#, i have an interface, and there are some class will implement this interface. i have a generic utility class, which i want to limit so that the utility class can only be declared using types implementing that interface, as show below, how can i do it??

public interface IMyInterface 
{}

public class A : IMyInterface {} // can pass into UtilityClass
public interface B : IMyInterface{}
public class C : B {} // can pass into UtilityClass
public class D {} // can Not pass into UtilityClass

public class UtilityClass<T is IMyInterface>
{
// some utility function
}

Thanks.

Answer 1

你重新寻找一种一般性的制约因素。在C#中,使用,,在类别名称后的关键词句。

public class UtilityClass<T> where T:IMyInterface
{

}

Answer 2

public class UtilityClass<T> where T: IMyInterface
{
// some utility function
}

他们被称为制约因素,可读到。

Answer 3

use the where clause:

public interface IMyInterface 
{}


public class UtilityClass<T> where T : IMyInterface
{
// some utility function
}

Answer 4

你们还可以对普通班级增加限制:

public class UtilityClass<T> where T : IMyInterface
{
// some utility function
}

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