InternalHandler.cs

    public class InternalHandler<I1, I2, O>
    {

        public delegate O ApplyMethod1(I1 input);
        public delegate O ApplyMethod2(I1 input, I2 context);

        public delegate I2 LoadMethod();

        private I2 _context = default;
        private LoadMethod _loadMethod = () => { return default;};
        private ApplyMethod1 _applyMethod1;
        private ApplyMethod2 _applyMethod2;
        public AlgorithmHandler(ApplyMethod1 func)
        {
            _applyMethod1 = func;
        }

        public AlgorithmHandler(ApplyMethod2 func)
        {
            _applyMethod2 = func;
        }
        
        ...
}