C# Language
- Getting started with C# Language
- Learn Tutorial
- How to Start Learning C# While Still in College
- Awesome Book
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- .NET Compiler Platform (Roslyn)
- Access Modifiers
- Access network shared folder with username and password
- Accessing Databases
- Action Filters
- Aliases of built-in types
- An overview of c# collections
- Anonymous types
- Arrays
- ASP.NET Identity
- AssemblyInfo.cs Examples
- Async/await, Backgroundworker, Task and Thread Examples
- Async-Await
- Asynchronous Socket
- Attributes
- BackgroundWorker
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- Binary Serialization
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BindingList
- Built-in Types
- C# 3.0 Features
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- C# 7.0 Features
- C# Authentication handler
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- Caching
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- CLSCompliantAttribute
- Code Contracts
- Code Contracts and Assertions
- Collection Initializers
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- Common String Operations
- Conditional Statements
- Constructors and Finalizers
- Creating a Console Application using a Plain-Text Editor and the C# Compiler (csc.exe)
- Creating Own MessageBox in Windows Form Application
- Creational Design Patterns
- Cryptography (System.Security.Cryptography)
- Data Annotation
- DateTime Methods
- Delegates
- Assigning a named method to a delegate
- Assigning to a delegate by lambda
- Closure inside a delegate
- Combine Delegates (Multicast Delegates)
- Declaring a delegate type
- Delegate Equality
- Encapsulating transformations in funcs
- Passing delegates as parameters
- Safe invoke multicast delegate
-
The Func
and Predicate delegate types - Underlying references of named method delegates
- Dependency Injection
- Diagnostics
- Dynamic type
- Enum
- Equality Operator
- Equals and GetHashCode
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- Func delegates
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- Guid
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- ICloneable
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- IDisposable interface
- IEnumerable
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- Immutability
- Implementing Decorator Design Pattern
- Implementing Flyweight Design Pattern
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- Including Font Resources
- Indexer
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- Initializing Properties
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- IQueryable interface
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- Microsoft.Exchange.WebServices
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- Null-Coalescing Operator
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- NullReferenceException
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- Object initializers
- Object Oriented Programming In C#
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ObservableCollection
- Operators
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- Threading
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- Unsafe Code in .NET
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- Using json.net
- Using SQLite in C#
- Using Statement
- Value type vs Reference type
- Verbatim Strings
- Windows Communication Foundation
- XDocument and the System.Xml.Linq namespace
- XML Documentation Comments
- XmlDocument and the System.Xml namespace
- Yield Keyword
C# Language Delegates
Remarks
Summary
A delegate type is a type representing a particular method signature. An instance of this type refers to a particular method with a matching signature. Method parameters may have delegate types, and so this one method to be passed a reference to another method, which may then be invoked
In-built delegate types: Action<...>, Predicate<T> and Func<...,TResult>
The System namespace contains Action<...>,Predicate<T> and Func<...,TResult> delegates, where the "..." represents between 0 and 16 generic type parameters (for 0 parameters, Action is non-generic).
Func represents methods with a return type matching TResult, and Action represents methods without a return value (void). In both cases, the additional generic type parameters match, in order, the method parameters.
Predicate represents method with boolean return type, T is input parameter.
Custom delegate types
Named delegate types can be declared using the delegate keyword.
Invoking delegates
Delegates can be invoked using the same syntax as methods: the name of the delegate instance, followed by parentheses containing any parameters.
Assigning to delegates
Delegates can be assigned to in the following ways:
- Assigning a named method
- Assigning an anonymous method using a lambda
- Assigning a named method using the
delegatekeyword.
Combining delegates
Multiple delegate objects can be assigned to one delegate instance by using the + operator. The - operator can be used to remove a component delegate from another delegate.
Delegates Related Examples
- Assigning a named method to a delegate
- Assigning to a delegate by lambda
- Closure inside a delegate
- Combine Delegates (Multicast Delegates)
- Declaring a delegate type
- Delegate Equality
- Encapsulating transformations in funcs
- Passing delegates as parameters
- Safe invoke multicast delegate
-
The Func
and Predicate delegate types - Underlying references of named method delegates
