using System;

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public abstract class Class1<T> { }

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public class DerivedC1 : Class1<int> { }

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public class Program

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{

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    public static void Main()

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    {

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        // Get the generic definition of the base class of DerivedC1

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        Type baseType = typeof(DerivedC1).BaseType;

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        // Get the generic type definition of the base class (Class1<>)

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        Type baseGenericTypeDefinition = baseType.GetGenericTypeDefinition();

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        // Check if Class1<> is assignable from the generic base type of DerivedC1

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        bool isAssignable = typeof(Class1<>).IsAssignableFrom(baseGenericTypeDefinition);

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        // Output the result

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        Console.WriteLine($"Is Class1<> assignable from the base type of DerivedC1: {isAssignable}");

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    }

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}

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