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CLR (Common Language Runtime): It is a common managed environment where all the .net programs run. Supports multiple languages and has the garbage collector. .Net Framework Class Libraries: For each source code compiler (VB.NET, C#.NET, etc.), there is a minimum set of coding standards that must be met. The minimum set of coding standards that must be met to compile .NET code into MSIL code is known as CLS - Common Language Specification. The role of the Common Language Specification is to ensure that all generated code (MSIL) that meets the minimum set of coding standards can operate successfully within the .NET framework. THE CTS (Common Type System) handles conversion of programming-language data types into .NET compatible (MSIL) data types. The implicit benefit of the CTS is the reduction of development time when attempting to coordinate data types between two sets of different programming-language code.

(Microsoft Intermediate Language) code in form of an assembly through CLS, CTS. IL is the language that CLR can understand. On execution, this IL is converted into binary code by CLR’s just in time compiler (JIT) and these assemblies or DLL are loaded into the memory. .NET’s Base class library exists in order to encapsulate huge number of common functions and makes them easily accessible to the developer. .NET base class library provides the functionality like ADO.NET, XML, Threading, IO, Security, Diagnostics, Resources, Globalization, collections etc. It serves as the main point of interaction between developer and runtime.

The garbage collector assumes that all objects in the managed heap are garbage. It starts walking the roots and builds a graph of all objects reachable from the roots recursively. It stops when it attempts to add an object to the graph that it previously added. The graph contains the set of all objects that are reachable from the application's roots. Any object/s that is not in the graph is not accessible by the application, and is considered garbage. Collection only occurs when the heap is full. In such a case, each and every garbage object calls the Finalize method and reclaims the unused memory. 55. Explain how garbage collection deals with circular references.

Break mode is the state of an application when the execution gets paused and allows the developer to edit the value in the current state. To attain a break mode we can do any of the following steps: a. Selecting Break from the Run menu (Ctrl+Break) or pressing the pause button. b. Reaching to break point. Setting up the break points: a. Go to the line where you need to mark the breakpoint. b. Click with mouse on left corner margin of that line. c. Another way is to press F9

Basic example for C# Online Tutoring Help is as follows :

  1. /*
  2.  *  C# Program to Display Cost of a Rectangle Plot Using Inheritance
  3.  */
  4. using System;
  5.     class Rectangle
  6.     {
  7.         protected double length;
  8.         protected double width;
  9.         public Rectangle(double l, double w)
  10.         {
  11.             length = l;
  12.             width = w;
  13.         }
  14.         public double GetArea()
  15.         {
  16.             return length * width;
  17.         }
  18.         public void Display()
  19.         {
  20.             Console.WriteLine("Length: {0}", length);
  21.             Console.WriteLine("Width: {0}", width);
  22.             Console.WriteLine("Area: {0}", GetArea());
  23.         }
  24.     } 
  25.     class Tabletop : Rectangle
  26.     {
  27.         private double cost;
  28.         public Tabletop(double l, double w)
  29.             : base(l, w)
  30.         { }
  31.         public double costcal()
  32.         {
  33.             double cost;
  34.             cost = GetArea() * 70;
  35.             return cost;
  36.         }
  37.         public void Display()
  38.         {
  39.             base.Display();
  40.             Console.WriteLine("Cost: {0}", costcal());
  41.         }
  42.     }
  43.     class CalRectangle
  44.     {
  45.         static void Main(string[] args)
  46.         {
  47.             Tabletop t = new Tabletop(7.5, 8.03);
  48.             t.Display();
  49.             Console.ReadLine();
  50.         }
  51.     }

Here is the output of the C# Program:

Length: 7.5  Width: 8.03  Area: 60.225  Cost: 4215.75


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