The Main Elements of the .NET Framework
The .NET Framework consists of three key elements
1. Common Language Runtime
2. NET Class Library
3. Unifying components
Common Language Runtime
The Common Language Runtime (CLR) is a layer between an application and the operating system it executes on. The CLR simplifies an application's design and reduces the amount of code developers need to write because it provides a variety of execution services that include memory management, thread management, component lifetime management, and default error handling. The key benefit of the CLR is that it transparently provides these execution services to all applications, regardless of what programming language they're written in and without any additional effort on the part of the developer.
The CLR is also responsible for compiling code just before it executes. Instead of producing a binary representation of your code, as traditional compilers do, .NET compilers produce a representation of your code in a language common to the .NET Framework: Microsoft Intermediate Language (MSIL), often referred to as IL. When your code executes for the first time, the CLR invokes a special compiler called a Just In Time (JIT) compiler, which transforms the IL into executable instructions that are specific to the type and model of your system's processor. Because all .NET languages have the same compiled representation, they all have similar performance characteristics. This means that a program written in Visual Basic .NET can perform as well as the same program written in Visual C++ .NET. (C++ is the language of choice for developers who need the best possible performance a system can deliver.)
1. Common Language Runtime
2. NET Class Library
3. Unifying components
Common Language Runtime
The Common Language Runtime (CLR) is a layer between an application and the operating system it executes on. The CLR simplifies an application's design and reduces the amount of code developers need to write because it provides a variety of execution services that include memory management, thread management, component lifetime management, and default error handling. The key benefit of the CLR is that it transparently provides these execution services to all applications, regardless of what programming language they're written in and without any additional effort on the part of the developer.
The CLR is also responsible for compiling code just before it executes. Instead of producing a binary representation of your code, as traditional compilers do, .NET compilers produce a representation of your code in a language common to the .NET Framework: Microsoft Intermediate Language (MSIL), often referred to as IL. When your code executes for the first time, the CLR invokes a special compiler called a Just In Time (JIT) compiler, which transforms the IL into executable instructions that are specific to the type and model of your system's processor. Because all .NET languages have the same compiled representation, they all have similar performance characteristics. This means that a program written in Visual Basic .NET can perform as well as the same program written in Visual C++ .NET. (C++ is the language of choice for developers who need the best possible performance a system can deliver.)
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