Generics

Generic Interfaces

A generic interface can describe behavior for a specific value type.

Generic Interfaces

GenericInterfaces.cs 
using System;

interface IFormatter<T>
{
    string Format(T value);
}

class IntFormatter : IFormatter<int>
{
    public string Format(int value)
    {
        return "value=" + value;
    }
}

class Program
{
    static void Main()
    {
        int value = ;
        IFormatter<int> formatter = new IntFormatter();
        string formatted = formatter.Format(value);

        Console.WriteLine($"value={value}");
        Console.WriteLine($"formatted={formatted}");
    }
}

using System;

interface IFormatter<T>
{
    string Format(T value);
}

class IntFormatter : IFormatter<int>
{
    public string Format(int value)
    {
        return "value=" + value;
    }
}

class Program
{
    static void Main()
    {
        int value = ;
        IFormatter<int> formatter = new IntFormatter();
        string formatted = formatter.Format(value);

        Console.WriteLine($"value={value}");
        Console.WriteLine($"formatted={formatted}");
    }
}

using System;

interface IFormatter<T>
{
    string Format(T value);
}

class IntFormatter : IFormatter<int>
{
    public string Format(int value)
    {
        return "value=" + value;
    }
}

class Program
{
    static void Main()
    {
        int value = ;
        IFormatter<int> formatter = new IntFormatter();
        string formatted = formatter.Format(value);

        Console.WriteLine($"value={value}");
        Console.WriteLine($"formatted={formatted}");
    }
}
generic interface A generic interface uses a type parameter in its contract.