Add links

docs/documentation/Guides/xtd.core/Types overview/delegates.md

@@ -28,17 +28,17 @@ This ability to refer to a method as a parameter makes delegates ideal for defin
 
 ## Difference betwwen xtd::delegate and std::function
 
-Unlike std::function, xtd::delegate can be chained together; for example, multiple methods can be called on a single event.
+Unlike [std::function](https://en.cppreference.com/w/cpp/utility/functional/function), [xtd::delegate](https://github.com/gammasoft71/xtd/blob/master/src/xtd.core/include/xtd/delegate.h) can be chained together; for example, multiple methods can be called on a single event.
 
-A xtd::delegate is a collection of std::function.
+A [xtd::delegate](https://github.com/gammasoft71/xtd/blob/master/src/xtd.core/include/xtd/delegate.h) is a collection of [std::function](https://en.cppreference.com/w/cpp/utility/functional/function).
 
 ## Delegates Overview
 
 Delegates have the following properties:
-* Delegates are similar to C++ function pointers, but delegates like std::function are fully object-oriented, and unlike C++ pointers to member functions, delegates encapsulate both an object instance and a method.
+* Delegates are similar to C++ function pointers, but delegates like [std::function](https://en.cppreference.com/w/cpp/utility/functional/function) are fully object-oriented, and unlike C++ pointers to member functions, delegates encapsulate both an object instance and a method.
 * Delegates allow methods to be passed as parameters.
 * Delegates can be used to define callback methods.
-* Unlike std::function, delegates can be chained together; for example, multiple methods can be called on a single event.
+* Unlike [std::function](https://en.cppreference.com/w/cpp/utility/functional/function), delegates can be chained together; for example, multiple methods can be called on a single event.
 * Lambda expressions are a more concise way of writing inline code blocks. Lambda expressions (in certain contexts) are compiled to delegate types. For more information about lambda expressions, see [Lambda expressions](https://en.cppreference.com/w/cpp/language/lambda).
 
 ## Using Delegates
@@ -292,7 +292,7 @@ introduce(42, 2.7);
 // This is world!
 ```
 
-This functionality of lambda expression is supported by [xtd::delegate](https://github.com/gammasoft71/xtd/blob/master/src/xtd.core/include/xtd/delegate.h) but not by std::function.
+This functionality of lambda expression is supported by [xtd::delegate](https://github.com/gammasoft71/xtd/blob/master/src/xtd.core/include/xtd/delegate.h) but not by [std::function](https://en.cppreference.com/w/cpp/utility/functional/function).
 
 ## See also