Tag: technology

Optional parameters can make your code more readable and easier to maintain, and can reduce the amount of typing you have to do

We can use optional parameters and no longer have to overload functions with a number of methods

Optional parameters are created in C# by specifying a default value and must appear after required parameters

Following is the way to specify optional parameters for function ReadFile static void ReadFile(string FileName:"", string OpenMode:"ReadOnly") {...}

It is no longer necessary to use Line continuation character ( _ ) to continue the code to next line. This is not supported in NET 4.0

Optional parameters can now be nullable

It is now possible to create Jagged Arrays with following syntax: Dim ArrayNewWay = {({"1", "2", "3"}), ({"4", "5"})}

Collections can now be initialized using the following syntax with the new From keyword: Dim Colors As New List(Of String) From {"Red", "Yellow", "Green"}

With .NET 4.0, installing a new version of .NET 4.0 has no effect on existing applications built in earlier versions of .NET

Components that were built with the .NET 1.1 can run side by side with version 2.0, 3.0, or 3.5 components

When native application that uses COM components built with earlier versions of the .NET Framework, the COM components will run with the version of the .NET Framework they were registered with

Managed application built with the .NET Framework 3.0 SP1 will run with the .NET Framework version 3.0, but can be configured to run on the .NET Framework 4 if version 3.0 is not present

MEF stands for Managed Extensibility Framework

Due to it’s declarative-based and discovery-enabled approach, MEF becomes very powerful to use in an application where it is being used to put together a bunch of potentially unknown parts into a working application

Using MEF, .NET applications can make the shift from being statically compiled to dynamically composed

MEF is part of System.ComponentModel.CompositeApplication assembly in .NET 4.0

In ASP.NET 4, new configuration elements have been added to Web.config and Web.Config size has increased

A new auto-start feature in ASP.NET 4.0 lets you perform expensive application initialization prior to processing the first HTTP request

ASP.NET 4 allow to extend output caching by enabling you to configure one or more custom output-cache providers that can use any storage mechanisms

ASP.NET 4 introduces a new compression option for Session State Compression for both out-of-process State Server & SQL Server session state providers to improve the performance

Task Parallel Library

LINQ

Concurrent Collection Classes

PLINQ

DataGrid

Calendar

DatePicker

Canvas

True

False

True

False

web.page.ui

web.ui.page

page

ui.web.page