using System;

using System.IO;

​

var foo = new Foo<double>(1.5d);

foo.LogToConsole("Hello world");

foo.LogtoFile("Hello world");

​

​

​

var result1 = Foo<double>.DoCalc(1, 2);

​

​

public class Foo<T>

{

    static protected T StartValue { get; private set; }

    public Foo(T startValue)

    {

        StartValue = startValue;

    }

    public static int DoCalc(object arg1, T arg2)

    {

        return (int)arg1 + Convert.ToInt32(arg2) / Convert.ToInt32(StartValue);

    }

    public static int higherOrderCalculation(Func<int, int, int> Func, int one, int two)

    {

        return Func(one, two);

    }

    public void LogToConsole(string message)

    {

        Console.WriteLine(string.Format(message));

    }

    public async void LogtoFile(string msg)

    {

        await File.AppendAllTextAsync($"logfile{DateTime.Now.ToString("yyyy-mm-dd")}.log", "msg");

    }

}

​