what is extension class in c#?
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Extension methods enable you to "add" methods to existing types without creating a new derived type, recompiling, or otherwise modifying the original type. Extension methods are static methods, but they're called as if they were instance methods on the extended type.
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Most extensions are per-user and are installed in the %LocalAppData%\Microsoft\VisualStudio\<Visual Studio version>\Extensions\ folder. A few extensions are administrative extensions and are installed in the <Visual Studio installation folder>\Common7\IDE\Extensions\ folder.
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The definition of a domain extension is the notation at the end of a web address that specifies an Internet category or a country code. An example of a domain extension which is an Internet category is .com for commercial, . org for organization, . gov for government, . edu for all educational institutions, .
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Generally, member functions are easier to find than extension functions, as they are guaranteed to be in the class they are a member of (or a super class/interface). They also do not need to be imported into all of the code that uses them.
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bas, . doc, and . html examples of Extensions. A file extension (or simply "extension") is the suffix at the end of a filename that indicates what type of file it is.
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C# Copy. public interface ILoggerFactory : IDisposable type ILoggerFactory = interface interface IDisposable Public Interface ILoggerFactory Implements IDisposable Derived. Microsoft.Extensions.Logging.LoggerFactory. Microsoft.Extensions.Logging.Abstractions.NullLoggerFactory.
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The XElement class is one of the fundamental classes in LINQ to XML. It represents an XML element. You can use this class to create elements; change the content of the element; add, change, or delete child elements; add attributes to an element; or serialize the contents of an element in text form.
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VS Code extensions let you add languages, debuggers, and tools to your installation to support your development workflow. VS Code's rich extensibility model lets extension authors plug directly into the VS Code UI and contribute functionality through the same APIs used by VS Code.
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In C#, an anonymous type is a type (class) without any name that can contain public read-only properties only. It cannot contain other members, such as fields, methods, events, etc. You create an anonymous type using the new operator with an object initializer syntax. ... notation, same as object properties.
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The virtual keyword is used to modify a method, property, indexer, or event declared in the base class and allow it to be overridden in the derived class. The override keyword is used to extend or modify a virtual/abstract method, property, indexer, or event of base class into derived class.
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Explanation: ::regclass is a cast, like ::integer . regclass is a "magic" data type; it's actually an alias for oid , or "object identifier". See Object identifier types in the documentation. Casting to regclass is a shortcut way of saying "this the name of a relation, please convert it to the oid of that relation".
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C# (pronounced see sharp, like the musical note C♯, but written with the number sign) is a general-purpose, multi-paradigm programming language encompassing strong typing, lexically scoped, imperative, declarative, functional, generic, object-oriented (class-based), and component-oriented programming disciplines.
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The objects are processed by their member data and functions. It is easy to analyze the user requirements. With the help of inheritance, we can reuse the existing class to derive a new class such that the redundant code is eliminated and the use of existing class is extended. This saves time and cost of program.
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Extensions are small software programs that customize the browsing experience. They enable users to tailor Chrome functionality and behavior to individual needs or preferences. ... They can range from a simple icon, such as the Google Mail Checker extension shown on the right, to overriding an entire page.
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A Generic collection is a class that provides type safety without having to derive from a base collection type and implement type-specific members. ... The key difference between Generic and Non-generic Collection in C# is that a Generic Collection is strongly typed while a Non-Generic Collection is not strongly typed.
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public interface WindowListener extends EventListener. The listener interface for receiving window events. The class that is interested in processing a window event either implements this interface (and all the methods it contains) or extends the abstract WindowAdapter class (overriding only the methods of interest).
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Inheritance: extend the functionality of a class by creating a subclass. Override superclass members in the subclasses to provide new functionality. ... Aggregation: create new functionality by taking other classes and combining them into a new class.