Microsoft Common Language Runtime 4.0.3019 Download
Annice
Compilers and tools expose the common language runtime's functionality and enable you to write code that benefits from the managed execution environment. Code that you develop with a language compiler that targets the runtime is called managed code. Managed code benefits from features such as cross-language integration, cross-language exception handling, enhanced security, versioning and deployment support, a simplified model for component interaction, and debugging and profiling services.
Compilers and tools can produce output that the common language runtime can consume because the type system, the format of metadata, and the run-time environment (the virtual execution system) are all defined by a public standard, the ECMA Common Language Infrastructure specification. For more information, see ECMA C# and Common Language Infrastructure Specifications.
To enable the runtime to provide services to managed code, language compilers must emit metadata that describes the types, members, and references in your code. Metadata is stored with the code; every loadable common language runtime portable executable (PE) file contains metadata. The runtime uses metadata to locate and load classes, lay out instances in memory, resolve method invocations, generate native code, enforce security, and set run-time context boundaries.
The runtime automatically handles object layout and manages references to objects, releasing them when they're no longer being used. Objects whose lifetimes are managed in this way are called managed data. Garbage collection eliminates memory leaks and some other common programming errors. If your code is managed, you can use managed, unmanaged, or both managed and unmanaged data in your .NET application. Because language compilers supply their own types, such as primitive types, you might not always know or need to know whether your data is being managed.
The common language runtime makes it easy to design components and applications whose objects interact across languages. Objects written in different languages can communicate with each other, and their behaviors can be tightly integrated. For example, you can define a class and then use a different language to derive a class from your original class or call a method on the original class. You can also pass an instance of a class to a method of a class written in a different language. This cross-language integration is possible because language compilers and tools that target the runtime use a common type system defined by the runtime. They follow the runtime's rules for defining new types and for creating, using, persisting, and binding to types.
As part of their metadata, all managed components carry information about the components and resources they were built against. The runtime uses this information to ensure that your component or application has the specified versions of everything it needs, which makes your code less likely to break because of some unmet dependency. Registration information and state data are no longer stored in the registry, where they can be difficult to establish and maintain. Instead, information about the types you define and their dependencies is stored with the code as metadata. This way, the task of component replication and removal is less complicated.
Language compilers and tools expose the runtime's functionality in ways that are intended to be useful and intuitive to developers. Some features of the runtime might be more noticeable in one environment than in another. How you experience the runtime depends on which language compilers or tools you use. For example, if you're a Visual Basic developer, you might notice that with the common language runtime, the Visual Basic language has more object-oriented features than before. The runtime provides the following benefits:
However, the .NET Framework version number doesn't necessarily correspond to the version number of the CLR it includes. For a list of .NET Framework versions and their corresponding CLR versions, see .NET Framework versions and dependencies.
The Common Language Runtime (CLR), the virtual machine component of Microsoft .NET Framework, manages the execution of .NET programs. Just-in-time compilation converts the managed code (compiled intermediate language code) into machine instructions which are then executed on the CPU of the computer.[1] The CLR provides additional services including memory management, type safety, exception handling, garbage collection, security and thread management. All programs written for the .NET Framework, regardless of programming language, are executed in the CLR. All versions of the .NET Framework include CLR. The CLR team was started June 13, 1998.
CLR implements the Virtual Execution System (VES) as defined in the Common Language Infrastructure (CLI) standard, initially developed by Microsoft itself. A public standard defines the Common Language Infrastructure specification.[2]
During the transition from legacy .NET technologies like the .NET Framework and its proprietary runtime to the community-developed .NET Core, the CLR was dubbed CoreCLR.[3] Today, it is simply called the .NET runtime.[4]
The Common Language Runtime (CLR) is a component of the Microsoft .NET Framework that manages the execution of .NET applications. It is responsible for loading and executing the code written in various .NET programming languages, including C#, VB.NET, F#, and others.
When a C# program is compiled, the resulting executable code is in an intermediate language called Common Intermediate Language (CIL) or Microsoft Intermediate Language (MSIL). This code is not machine-specific, and it can run on any platform that has the CLR installed. When the CIL code is executed, the CLR compiles it into machine code that can be executed by the processor.
The CLR provides many services to .NET applications, including memory management, type safety, security, and exception handling. It also provides Just-In-Time (JIT) compilation, which compiles the CIL code into machine code on the fly as the program runs, optimizing performance.
Additionally, the CLR provides a framework for developing and deploying .NET applications, including a set of libraries, called the .NET Framework Class Library, which provides access to a wide range of functionality, such as input/output operations, networking, database connectivity, and user interface design.
Overall, the CLR is a critical component of the .NET Framework and is responsible for ensuring that .NET applications are executed in a safe, secure, and efficient manner, making it a fundamental aspect of C# programming.
Common Language Specification (CLS):
It is responsible for converting the different .NET programming language syntactical rules and regulations into CLR understandable format. Basically, it provides Language Interoperability. Language Interoperability means providing execution support to other programming languages also in .NET framework.
Common Type System (CTS):
Every programming language has its own data type system, so CTS is responsible for understanding all the data type systems of .NET programming languages and converting them into CLR understandable format which will be a common format.
Garbage Collector:
It is used to provide the Automatic Memory Management feature. If there was no garbage collector, programmers would have to write the memory management codes which will be a kind of overhead on programmers.
JIT(Just In Time Compiler):
It is responsible for converting the CIL(Common Intermediate Language) into machine code or native code using the Common Language Runtime environment.
The Common Language Runtime (CLR) is programming that manages the execution of programs written in any of several supported languages, allowing them to share common object-oriented classes written in any of the languages. It is a part of Microsoft's .NET Framework. The CLR is somewhat comparable to the Java virtual machine that Sun Microsystems provides for running programs compiled from the Java language. Microsoft refers to its CLR as a "managed execution environment." A program compiled for the CLR does not need a language-specific execution environment and can easily be moved to and run on any system with Windows 2000 or Windows XP.
Programmers writing in any of Visual Basic , Visual C++ , or C# compile their programs into an intermediate form of code called Common Intermediate Language (CIL) in a portable execution file that can then be managed and executed by the CLR. The programmer and the environment specify descriptive information about the program when it is compiled and the information is stored with the compiled program as Metadata . Metadata, stored in the compiled program, tells the CLR what language was used, its version and what class libraries will be needed by the program. The CLR allows an instance of a class written in one language to call a method of a class written in another language. It also provides garbage collecting (returning unneeded memory to the computer), exception handling and debugging services.
Today we are excited to announce the availability of the .NET Framework 4.6.2! Many of the changes are based on your feedback, including those submitted on UserVoice and Connect. Thanks for your continued help and engagement!
This new capability is enabled for applications that target the .NET Framework 4.6.2 (or later). You can configure an application to target the .NET Framework 4.6.2 with the following app.config or web.config configuration file:
You can opt applications that target an earlier version of the .NET Framework into using this functionality by setting an AppContext switch, as demonstrated in the following configuration file. The switch will only be honored when an application in running on the .NET Framework 4.6.2 (or later).
The absence of targeting the .NET Framework 4.6.2 or setting the AppContext switch results in the existing behavior of being blocked from using paths longer than MAXPATH. The behavior is opt-in to maintain backwards compatibility for existing applications.
e59dfda104