Posts tagged Keywords

C# virtual Keywords: More speed

Oct 14th

Posted by SAJJAD in C#

No comments

using System;

namespace ConsoleApplication
{
	class Program
	{
		static void Main(string[] args)
		{
			Console.WriteLine("Area of 5 is: " + (new Circle(5).Area()).ToString());
			Console.WriteLine("Perimeter of 5 is: " + (new Circle(5).Perimeter()).ToString());

			Circle C = new Circle(8.5);
			Console.WriteLine("\nArea of 8.5 is: " + C.Area().ToString());
			Console.WriteLine("Perimeter of 8.5 is: " + C.Perimeter().ToString());

			Console.Read();
		}
	}

	abstract class Shape
	{
		public double X, Y;

		public Shape() : this(0) { }
		public Shape(double X)
		{
			this.X = this.Y = X;
		}
		public Shape(double X, double Y)
		{
			this.X = X;
			this.Y = Y;
		}

		public virtual double Area()
		{
			return this.X * this.Y;
		}

		public virtual double Perimeter()
		{
			return 2 * this.X * this.Y;
		}
	}

	sealed class Circle : Shape
	{
		public Circle() : base(0) { }
		public Circle(double Radius) : base(Radius) { }

		public override double Area()
		{
			return Math.PI * this.X * this.X;
		}

		public override double Perimeter()
		{
			return 2 * Math.PI * this.X;
		}
	}
}
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C# params Keywords

Oct 14th

Posted by SAJJAD in C#

No comments

using System;

namespace ConsoleApplication
{
	class Program
	{
		static void Main(string[] args)
		{
			if (Containt(typeof(int), new object[] { true, 1, 110.1F, 20L, 80.0001D, "SAJJAD", DateTime.Now }))
			{
				Console.WriteLine("Array contain Int32 type !");
			}

			if (Containt(typeof(DateTime), true, 1, 110.1F, 20L, 80.0001D, "SAJJAD", DateTime.Now))
			{
				Console.WriteLine("Array contain Datetime type !");
			}

			Console.ReadLine();
		}

		static bool Containt(Type type, params object[] list)
		{
			foreach (object obj in list)
				if (obj.GetType() == type)
					return true;

			return false;
		}
	}
}
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C# Reserved and Contextual Keywords

Oct 8th

Posted by SAJJAD in C#

No comments

Specification keywords
abstract | as | base | bool | break | byte | case | catch | char | checked | class | const | continue | decimal | default | delegate | do | double | else | enum | event | explicit | extern | false | finally | fixed | float | for | foreach | goto | if | implicit | in | int | interface | internal | is | lock | long | namespace | new | null | object | operator | out | override | params | private | protected | public | readonly | ref | return | sbyte | sealed | short | sizeof | stackalloc | static | string | struct | switch | this | throw | true | try | typeof | uint | ulong | unchecked | unsafe | ushort | using | virtual | void | volatile | while

Magic keywords
__arglist | __makeref | __reftype | __refvalue

Keywords as an identifier
@typeof @goto = @for.@switch(@throw);

Preprocessor keywords
#define | hidden | default | disable | restore | checksum

C# 1.0 Contextual keywords
get | set | value | add | remove

C# 2.0 Contextual keywords
where | partial | global | yield | alias

C# 3.0 Contextual keywords
from | join | on | equals | into | orderby | ascending | descending | group | by | select | let | var

C# 4.0 Contextual keywords
dynamic

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