Learn .Net Advanced with Free Lessons & Tips

CLR [ Common Language Runtime ] is one of the components of the .NET framework which provides an environment to execute the .NET code or the managed code. , CLR helps in converting the MSIL/CIL code into native code and running it.

Properties of CLR :

• Common Language Specification [ CLS]: a set of language rules, common to all the .NET supported programming languages.
• Common Type System [ CTS]: a data type system, familiar to all the .NET supported programming languages, which is further divided into value types and reference types
• Garbage Collector [ GC]: responsible for the "Automatic memory management."
• Just in Time [ JIT ] compiler: converts the MSIL/CIL code into native code

NOTE: we'll learn more about the CLR properties in the sessions.

Garbage collector [ GC ] is responsible for the "automatic memory management - AMM" in .NET framework. Garbage collector [ GC ] is one of the properties of .NET framework components CLR [ common language runtime ].

Why there is a need of "Memory management"?

Ans : Basically, Operating Sytem [ OS ] stores the data that is processed and accessed during programming / development of the applications in the memory. Sometimes that memory gets filled and developers may not be able to store the new data / input that is coming into. 

At this moment, developers need to write a seperate logic for the management of the memory, where they've to identify the unused or unnecessary data that has occupied the OS memory and need to write the logic for releasing that memory which is a burden for the developers.

Hence, to avoid the burden on the developers , this "automatic memory management" is needed.

In .NET, Garbage collector [ GC ] is responsible for the "automatic memory management" and it's popular for it's efficiency.

Working of Garbage collector [ GC ] : 

Garbage collector [ GC ] identifies the active and idled objects from the  heap memory , retains the active objects and destroys the idled objects and releases the memory. 

NOTE: GC provides automatic memory management only for "Reference types"

Generations of GC : 

Garbage collector [ GC ] divides the heap memory into 3 parts or generations and are named as Generation 0 , Generation 1 & Generation 2. Always Gen 0 > Gen 1 > Gen 2

Whenever a new object gets created , it occupies the memory only in Gen 0.

When Gen 0 gets filled completely, Garbage collector [ GC ] performs an action called "Collection" on Gen 0 , identifies the active and idled objects , pushes the active objects into Gen 1 and destroys the idled objects from the Gen 0 and releases the memory. 

When Gen 1 gets filled completely, Garbage collector [ GC ] performs an action called "Collection" on Gen 1 , identifies the active and idled objects , pushes the active objects into Gen 2 and destroys the idled objects from the Gen 1 and releases the memory. 

When Gen 2 gets filled completely, Garbage collector [ GC ] performs an action called "Collection" on Gen 2 , identifies the active and idled objects , retains the active objects and destroys the idled objects from the Gen 2 and releases the memory. 

Thus , Garbage collector [ GC ]  is efficient and responsible for "Automatic memory management" in .NET framework.

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Hello Kirit,

The application which were devloped about 2 decades back was mostly coded in java and so you will see so many of the application (in several company and outside) written in java. .Net(collectively C#) on the other hand is a new entrant in the ring and there have been several devlopment on that too..

A good programmer needs strong logics, algorithm building and problem solving ability. The languages (java or anything else) gives you the syntax to code what you have thought. Of course each programming langauge has its own pro n cons (depends on what you are looking in the language). As mentioned above there are great frameworks designed in java. Java might give you an edge but a career is what you make out of it.

Cheers!

Thanks,
Arun

.NET development has started in the year 2000 , a product of Microsoft. From the begining of .NET development till now, it has got many RAD [ rapid application development ] facilities. 

Why .NET?

developed for distributed computing applications [ which access the data from any centralized locations ] , later due it's advantages and features started using for the development of desktop applications , web applications , mobile applications etc,.

What is .NET?

It's a framework which creates a "runtime environment" for .NET based applications.

Supports 61 programming languages like C# , Vb.net , F# etc,.

Components of .NET framework:

1. CLR [ common language runtime ] - which provides all the facilities and features to the .net application at the time of execution to execute the code. 
2. Assemblies / Base class libraries [BCL] - collection of types and resources that forms a logical unit of functionality. Also , known as building blocks for the .net applications and are self-describing in nature. 

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.NET Framework is a software framework developed by Microsoft. It includes a large class library named Framework Class Library (FCL) and provides language interoperability (each language can use code written in other languages) across several programming languages.

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