The using static [Namespace.Type]
directive allows the importing of static members of types and enumeration values. Extension methods are imported as extension methods (from just one type), not into top-level scope.
using static System.Console;
using static System.ConsoleColor;
using static System.Math;
class Program
{
static void Main()
{
BackgroundColor = DarkBlue;
WriteLine(Sqrt(2));
}
}
using System;
class Program
{
static void Main()
{
Console.BackgroundColor = ConsoleColor.DarkBlue;
Console.WriteLine(Math.Sqrt(2));
}
}