constructor constraint : Generic Constraint « Generics « C# / C Sharp

1. C# / C Sharp
2. Generics
3. Generic Constraint

constructor constraint

 

using System;


public class Starter {
    public static void Main() {
        MyClass obj = new MyClass();
        obj.MethodA<XClass>();
    }
}

public class MyClass {
    public void MethodA<T>()
                 where T : XClass, new() {
        Console.WriteLine("MyClass.MethodA");
        T obj = new T();
        obj.MethodB();
    }
}

public class XClass {
    public void MethodB() {
        Console.WriteLine("XClass.MethodB");
    }
}

 

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2.	Combination of Overriding Generic Methods
3.	A base class constraint
4.	Use an interface constraint
5.	A new() constructor constraint
6.	Reference Type Constraint: A reference type constraint restricts a type parameter to a reference type.
7.	Demonstrate a reference constraint
8.	Demonstrate a value type constraint
9.	A type parameter can be used as a constraint
10.	Reference Type Constraint
11.	Default Constructor Constraint
12.	Derivation Constraint