Currying.cs

public void A(Func<string> x)
{
    for (int i = 0; i < 10; i++)
    {
        var data = x.Invoke();
        Console.WriteLine(data);
        Console.WriteLine(i);
    }
}

public Func<string> B(string fileName)
{
     // process fileName
     var data = File.ReadAllText(fileName);
     return () => data;
}

public void Main()
{
     A(B("/home/user1/a.txt"));
}