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// CS0315: The type `int' cannot be used as type parameter `U' in the generic type or method `A<int?>.Test<U>()'. There is no boxing conversion from `int' to `int?'
// Line: 19
class A<T>
{
public static void Test<U> () where U : T
{
}
}
class B : A<int?>
{
}
class Program
{
public static void Main ()
{
B.Test<int> ();
}
}
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