Introduction to C# and .NET 6

A language that sits above platform-specific instruction sets, used by .NET compilers to generate executable code.

A file containing CIL instructions, metadata, and a manifest that describes the program's components.

A .dll assembly containing CIL instructions, metadata, and a manifest.

It's a tool used to view the CIL instructions within a .dll assembly.

It compiles C# code into CIL instructions.

It compiles Visual Basic code into CIL instructions.

It allows for platform independence. Compilers generate CIL, which is then executed by the .NET runtime on different platforms.

Platform independence, allowing .NET applications to run on various platforms.

.NET is a software platform designed for building applications that run on various operating systems, including Windows, iOS, and Linux, and supports a wide range of application types like web services, desktop applications (WinForms and WPF), and more.

.NET offers numerous benefits, including supporting multiple programming languages (C#, F#, VB.NET) for flexibility, a shared runtime environment for consistency, and cross-language compatibility for working with different code bases.

The .NET Runtime is the engine that powers .NET applications, managing how code executes. It provides features like memory management, type safety, and security.

The CTS defines a standard set of types that all .NET languages understand. It ensures consistency and interoperability across different programming languages.

The CLS outlines a set of rules and guidelines that .NET languages must adhere to, ensuring that components written in different languages can interact seamlessly.

A vast collection of pre-built classes and functions provided by .NET, offering ready-to-use functionality for tasks such as file manipulation, networking, and user interface elements.

Yes, the .NET platform is designed to be language-agnostic, meaning developers can choose different programming languages (C#, F#, VB.NET) to build applications that work seamlessly within the same environment.

Yes, .NET applications can run on multiple operating systems (Windows, iOS, Linux) due to .NET's portability and compatibility with different platforms.

Information embedded in .NET assemblies that describes types, methods, and other program elements. This metadata allows the .NET runtime to understand and interpret the code.

A specific type of metadata that describes the structure of a class, interface, or other type within an assembly. It specifies things like fields, methods, and properties.

A section of metadata within a .NET assembly that describes the assembly itself. It contains information like dependencies, version, and copyright information.

Metadata allows the .NET runtime to understand code structure, dependencies, and other crucial aspects of the assembly. It enables the runtime to execute the code correctly and efficiently.

IntelliSense relies on metadata to provide code completion suggestions and other helpful features in development tools like Visual Studio.

A mechanism in .NET that allows programs to examine and manipulate their own structure and behavior at runtime using metadata.

Metadata enables late binding by allowing the runtime to resolve method calls and data accesses at runtime, rather than at compile time.

The process of converting an object's state into a stream of bytes for storage or transmission. Metadata plays a pivotal role in this process by describing the object structure.

A lightweight class-like type used to model data with value-based semantics. It can contain fields, constructors, and methods.

The struct keyword in C# is used to define a structure type, enabling the creation of lightweight, value-based data structures.

A data type that groups named constants, providing a way to represent a set of related values.

The enum keyword in C# is used to define an enumeration type, providing a structured way to represent a set of related values.

Enumerations in C# default to using a 32-bit integer for storing values.

A type-safe function pointer in C# that can 'point to' methods with matching signature.

The delegate keyword in C# is used to define a delegate type, creating a reference for functions with specific parameters and return types.

A system in .NET where objects communicate by raising events that other objects can subscribe to and handle.

A .NET compiler or code is CLS compliant if it follows the rules defined by the Common Language Specification.

CLS rules apply only to parts of a type exposed outside the defining assembly.

The CLS only mandates compliance for member definitions (naming, parameters, return types) of a type. Internal implementation details can use non-CLS techniques.

The CLS does not require support for unsigned data types. Using them in exposed parts of a type will make it non-compliant.

Using non-CLS features (like unsigned data) inside a method, but not exposing them externally, maintains CLS compliance.

Allows for seamless interoperability between different .NET languages, ensuring that code written in one language can be accessed and used by others.

The CLS can be viewed as a subset of the Common Type System (CTS). The CTS defines a broader set of features and the CLS specifies the minimum subset required for interoperability.

This namespace provides fundamental data types, mathematical operations, environmental information, and garbage collection mechanisms. It also includes common exceptions and attributes.

These namespaces offer ready-made data containers like lists and dictionaries, as well as tools to build your own customized collections.

These namespaces are crucial for interacting with relational databases (like SQL Server) using ADO.NET.

These namespaces provide tools to work with files, directories, compression, and communication ports.

These namespaces empower you to dynamically examine and manipulate code at runtime. You can analyze types, create objects, and even generate code on the fly.

This namespace helps .NET interact with unmanaged code, such as C-based DLLs and COM servers.

These namespaces use the original .NET UI toolkit to build desktop applications. They offer a wide array of visual components.

This namespace helps build web applications and RESTful services using the latest ASP.NET Core framework.