TypeExtensions.cs

#nullable enable
namespace NServiceBus.Persistence.DynamoDB
{
    using System;

    static class TypeExtensions
    {
        public static bool IsAssignableToGenericType(this Type givenType, Type genericType)
        {
            var interfaceTypes = givenType.GetInterfaces();

            foreach (var it in interfaceTypes)
            {
                if (it.IsGenericType && it.GetGenericTypeDefinition() == genericType)
                {
                    return true;
                }
            }

            if (givenType.IsGenericType && givenType.GetGenericTypeDefinition() == genericType)
            {
                return true;
            }

            Type? baseType = givenType.BaseType;
            if (baseType == null)
            {
                return false;
            }
            return IsAssignableToGenericType(baseType, genericType);
        }
    }
}