The overriding method cannot change the inherited constraints.

 

using System;

public class MyClass {
    public virtual void MethodA<T>(T arg)
        where T : new() {
    }
}

public class YClass : MyClass {
    public override void MethodA<T>(T arg) {
        T obj = new T();
    }
}

Related examples in the same category

1.	A simple generic class hierarchy
2.	A derived class with its own type parameters
3.	A non-generic class can be the base class of a generic derived class
4.	Overriding a virtual method in a generic class

The overriding method cannot change the inherited constraints. : Generic Class Hierarchy « Generics « C# / C Sharp

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