static void Main()
{
// Declare a class instance box1:
Box box1 = new Box(30.0f, 20.0f);
// Declare an interface instance dimensions:
IDimensions dimensions = box1;
// The following commented lines would produce compilation
// errors because they try to access an explicitly implemented
// interface member from a class instance:
//System.Console.WriteLine("Length: {0}", box1.getLength());
//System.Console.WriteLine("Width: {0}", box1.getWidth());
// Print out the dimensions of the box by calling the methods
// from an instance of the interface:
System.Console.WriteLine("Length: {0}", dimensions.getLength());
System.Console.WriteLine("Width: {0}", dimensions.getWidth());
}
static void Main(string[] args)
{
SampleClass sc = new SampleClass();
IControl ctrl = (IControl)sc;
ISurface srfc = (ISurface)sc;
// The following lines all call the same method.
sc.Paint();
ctrl.Paint();
srfc.Paint();
SampleClass2 obj = new SampleClass2();
//obj.Paint(); // Compiler error.
IControl c = (IControl)obj;
c.Paint(); // Calls IControl.Paint on SampleClass.
ISurface s = (ISurface)obj;
s.Paint(); // Calls ISurface.Paint on SampleClass.
//=======================================================
// Declare a class instance box1:
Box box1 = new Box(30.0f, 20.0f);
// Declare an instance of the English units interface:
IEnglishDimensions eDimensions = (IEnglishDimensions)box1;
// Declare an instance of the metric units interface:
IMetricDimensions mDimensions = (IMetricDimensions)box1;
// Print dimensions in English units:
System.Console.WriteLine("Length(in): {0}", eDimensions.Length());
System.Console.WriteLine("Width (in): {0}", eDimensions.Width());
// Print dimensions in metric units:
System.Console.WriteLine("Length(cm): {0}", mDimensions.Length());
System.Console.WriteLine("Width (cm): {0}", mDimensions.Width());
//=======================================================
Box2 box2 = new Box2(30.0f, 20.0f);
IMetricDimensions mDimensions2 = (IMetricDimensions)box2;
System.Console.WriteLine("Length(in): {0}", box2.Length());
System.Console.WriteLine("Width (in): {0}", box2.Width());
System.Console.WriteLine("Length(cm): {0}", mDimensions2.Length());
System.Console.WriteLine("Width (cm): {0}", mDimensions2.Width());
//=======================================================
// Declare a class instance box1:
Box3 box3 = new Box3(30.0f, 20.0f);
// Declare an interface instance dimensions:
IDimensions dimensions = (IDimensions)box3;
// The following commented lines would produce compilation
// errors because they try to access an explicitly implemented
// interface member from a class instance:
//System.Console.WriteLine("Length: {0}", box1.getLength());
//System.Console.WriteLine("Width: {0}", box1.getWidth());
// Print out the dimensions of the box by calling the methods
// from an instance of the interface:
System.Console.WriteLine("Length: {0}", dimensions.getLength());
System.Console.WriteLine("Width: {0}", dimensions.getWidth());
}
