I implemented the Interface but I get "does not implement interface member" [duplicate]

Question

I am receiving this error:

CalculatorCalories does not implement interface member ICalculatorCalories.GetIndex

But I implemented the interface's method:

namespace WindowsFormsApp1
{
    public interface ICalculatorCalories
    {
        int GetIndex { get; }
    }

    public partial class CalculatorCalories : Form, ICalculatorCalories
    {
        public CalculatorCalories()
        {
            InitializeComponent();
        }

        public int GetIndex(int growthC, int sex)
        {
            int index = growthC - 100 - ((growthC - 150) / sex);
            return index;
        }
    }
}

GetIndex is a property! Not a method

Muaath
– Muaath

2020-12-21 10:39:40 +00:00
Commented Dec 21, 2020 at 10:39 — Muaath
– Muaath, Commented Dec 21, 2020 at 10:39

jleach · Accepted Answer · 2017-12-11 00:43:15Z

4

The problem is because the interface defines a readonly property, where the implementation's GetIndex is a method. You need to change one or the other.

Presumably, edit your interface to:

public interface ICalculatorCalories
{
    int GetIndex(int growthC, int sex);
}

answered Dec 11, 2017 at 0:43

jleach

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Comments

Camilo Terevinto · Accepted Answer · 2017-12-11 01:07:45Z

3

In ICalculatorCalories you've defined GetIndex as a getter property instead of the function that you've implemented. In order for the class to implement the interface, the signature of the methods/properties must match.

Suggest fixing the interface:

public interface ICalculatorCalories
{
    int GetIndex(int growthC, int sex);
}

edited Dec 11, 2017 at 1:07

Camilo Terevinto

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answered Dec 11, 2017 at 0:42

Reddog

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