C# Corner

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  • Hello World Android Application Using KotlinFeb 01, 2018. Google officially announced Kotlin as a first class language for Android development at Google I/O 2017. From Android Studio 3.0, Kotlin is included as Support for Android Studio. In this post, we will learn Kotlin for the development of Android applications in Android Studio.
  • Performing CRUD Operations On Azure SQL Database Using SharePoint Framework Web Part And ASP.NET Web API - Part TwoJan 30, 2018. Normally, you would want to put your css classes in the .scss file (i.e. YourWebpartName.scss) and import it into the YourWebpartName.ts file (this is actually done automatically during project creation). But I decided to put it in a SharePoint list because my css selectors are grouped and I could not reference them using "styles.selector".
  • Deploying Multiple ASP.NET Core Apps To Docker And AzureJan 22, 2018. API - has controller with CRUD operations for a movies database. It uses a class library Data, which contains repositories. Database is hosted in Azure and connection string stored in application settings (appsettings.json).
  • Publish Nuget Packages In .NET CoreJan 19, 2018. Now that you have a registry and key to upload your packages, let’s create and push a package. I am using here a simple .NET Core class library I wrote to work with CSV files, the source code can be found on GitHub. You can of course use any of your projects.
  • App.Config AutoReaderJan 17, 2018. In our day to day development, it is a rare case where we don’t need to read a configuration file. There are many techniques for the treatment of such static classes, singleton classes, etc and it is normally that the Config class is accessible in all projects.
  • Basics Of Kotlin - JVM ImplementationJan 15, 2018. Hello Guys, we already knew that Google announced that Kotlin is a new first class language for Android Development. Kotlin is now an official language on Android. It's expressive, concise, and powerful. Best of all, it's interoperable with our existing Android languages and runtime.
  • Basics Of Angular And Its Versions - Part TwoJan 15, 2018. Module is nothing but a package like a package in Java, a namespace in C# and like a header-file in C / C++. Java, C#, and C++ have their own modularity system which contains classes, interfaces, enumerations etc. In the same way, Angular also has its own modularity system called NgModules which helps to organize an application into adhesive blocks of functionality. Every Angular application should have at least one NgModule and the root module is called AppModule.
  • Singleton Design Pattern In C# - Part Three (Static vs Singleton)Jan 11, 2018. In this series of learning singleton patterns, we learned lazy initialization and eager initializations with practical examples. We also learned why it is necessary to make the singleton class sealed with sealed keyword. In this article, I’ll try to explain the differences between static and singleton class and where to use static and where to use singleton classes.
  • Singleton Design Pattern In C# - Part Two (Eager and Lazy Initialization in Singleton)Jan 09, 2018. In this article, we’ll discuss Lazy initialization, the lazy keyword, why to make singleton class a sealed class and what are the differences between singleton and static class.
  • Three Popular C# InterfacesJan 09, 2018. In this article, you will learn about the most common interfaces in the C# Libraries that you can use to create robust classes and objects.
  • Hashing In ASP.NET Core 2.0Jan 08, 2018. The new Data Protection API in .NET Core includes functionality to create hashes using PBKDF2algorithm. ASP.NET Core uses this behind the scenes in PasswordHasher class, which is used in ASP.NET Core Identity.
  • Singleton Design Pattern In C# - Part OneJan 08, 2018. I always wanted to write about Singleton design pattern in C#. Though there already are many posts available on Singleton design pattern, I’ll try to cover this topic in the most simplistic and easy to understand way.
  • Device Year Class Library Using Android ApplicationJan 02, 2018. Android device's specifications and calculates which year the device would be considered.
  • Creating A CRUD With ASP.NET Core And EF CoreDec 28, 2017. Entity Framework Core (EF) is an ORM that makes it simpler to work with database by using POCO classes that map to database entities and DbContext to interact with them.
  • Consuming ASP.NET Core 2.0 Web API Using HttpClientDec 26, 2017. We’ll create a library to wrap the functionality of HttpClient. I’ll use builder pattern for this purpose. Add a class with methods for storing parts of HttpClient.
  • Validating User Input Using Regular Expression With C#Dec 22, 2017. In this article, you will learn how to validate user input using Regex class with C# Programming language
  • Asynchronous Messaging Using ASP.NET Core 2.0 Web APIDec 21, 2017. How to implement asynchronous messaging using ASP.NET Core Web API. Create an empty project and update the Startup class to add services and middleware for MVC.
  • Configure Identity In ASP.NET Core 2.xDec 15, 2017. Identity is a membership system that allows us to add login functionality to our application. In my previous article, I have explained about the overview of Identity in ASP.net Core. There are some default behaviors that can be overridden easily in our application in ConfigureService method of startup class.
  • Special Class Of C# Series - Part Two - OLE DB (Extended Properties)Dec 14, 2017. In this series of C# Special classes, we are going to see the special features available with the “OleDbConnection” class and its specialties.
  • Special Class Of C# Series - Part One - Partial ClassDec 13, 2017. This article will help you understand what partial class is used in C-Sharp language. Also, I will explain the various uses of the partial class.
  • Understanding Classes In KotlinDec 07, 2017. In the above example, I have created a nested class ‘Nestedclass’ which has a data member ‘b’ and a member method show(),now the object of nested class can access member of nested class only.
  • Aspect Oriented Programming In C# Using DispatchProxyDec 06, 2017. Example of implementing logging using Aspect Oriented approach with DispatchProxy class.
  • Building Entity Framework Disconnected Generic RepositoryNov 29, 2017. The repository pattern separates and retrieves data model mapping logic from the business logic. We will create a repository class for each entity class in our application. All these classes usually have a main group of equals methods.
  • Comparing Objects In C#Nov 29, 2017. In this article, we are going to compare two objects of the same class having collection property or multiple collection properties.
  • MVC 5 Demo Project With Entity Framework (DB First)Nov 23, 2017. MVC project has been set up. Now, make a new C# class library project which will act as a DAL layer and Entity Framework will be handled through this project.
  • Your Singleton Might Not Be "Single"Nov 21, 2017. Singleton has been a very popular design pattern as it is proven to have some advantages compared to the global variables
  • Passing Parameters To Middleware In ASP.NET Core 2.0Nov 15, 2017. I discussed in an earlier post that it is good practice to define middleware in a separate class and add to the pipeline using extension methods. We may also need to pass information to our middleware classes though and I’ve come across two patterns for this when digging into ASP.NET Core source code and other samples online.
  • What Is Struct And When To Use Struct In C#Nov 15, 2017. 'Struct' keyword is used to create a structure. A structure can contain variables, methods, static constructor, parameterized constructor, operators, indexers, events, and property. A structure can not derive/inherit from any structure or class. A structure can implement any number of interfaces. Structures provide better performance.
  • Azure Table Storage In ASP.NET Core 2.0Nov 14, 2017. Add a class to encapsulate storage access. Add a private helper method to access storage
  • How To Use StringBuilder And File Class For .NET ApplicationNov 14, 2017. Here, I am going to share how and why should we create error log in our application.
  • Introduction To Xamarin.Android Using C# - Part OneNov 10, 2017. Xamarin.Android will create native Android applications using modern language (C#), .NET Base Class Library Visual Studio. Xamarin is a cross-platform development tool. It solves dilemmas many developers face when developing cross-platform apps: separate coding languages and UI paradigms. With Xamarin, you can use C# for iOS, Android, and Universal Windows apps. And with Xamarin Forms, interface design for all three platforms can be accomplished within its XAML-based framework.
  • Binding DropDown List Using Tuple In ASP MVCNov 05, 2017. Tuple is a generic static class that was added to C# 4.0 and it can hold any amount of elements, and they can be any type we want. So using tuple, we can return multiple values.One great use of tuple might be returning multiple values from a method. It provides an alternative to "ref" or "out" if you have a method that needs to return multiple new objects as part of its response.
  • Three Digit Sum Using Tuple in C#Nov 02, 2017. In this article, we will be discussing an algorithm which returns possible (no. of pairs) digit pairs that are equal to a given number (6) using Tuple class.
  • SystemDataPaths In UWP (Windows 10 Fall Creators Update Features)Oct 31, 2017. This article explains about how to get system , app , user based path information. This SystemDataPaths, UserDataPaths, AppDataPaths class will be supported on Windows 10 Fall creators updated version build or greater and Windows 10 SDK 16999.
  • Getting Started With Receipt Card Design Using Microsoft Bot FrameworkOct 29, 2017. The Bot Framework supports different type of rich cards and provides a richer interaction experience to the user. In this article, I will show how to integrate Receipt card UI design in a Bot Application. If you are developing a shopping card Bot chat application; receipt card is very important. Receipt card class has property as a list of items, total, tax, vat, title and image. We can re-use all receipt card properties and add tab action event for navigating to original invoice website.
  • Add Class Library In ASP.NET Core Using .NET Core Command-Line Interface (CLI)Oct 29, 2017. This article explains how to add Class Library in ASP.NET Core using .NET Core Command-Line Interface (CLI) with a simple way. Before reading this article, read the previous parts of this article using below article link.
  • Debugging Tips - Part TwoOct 27, 2017. While working on complex classes/objects, it really takes two more clicks to either add that object to the Watch window or expand the object in visualizer and navigate to a specific property.
  • Debugging Tips - Part OneOct 24, 2017. A cool attribute to save some debugging time is DebuggerTypeProxy (Namespace: System.Diagnostics). Using this attribute, you can write your own logic to interpret the object at debug time. Meaning, if you have a list of class objects then you can project on certain properties and force debugger to show the value off of this proxy class. This attribute is applicable to Structures, Classes and Assemblies.
  • Getting Started With Entity Framework Core - Database-First DevelopmentOct 12, 2017. This article is the first part of the series on Getting Started with Entity Framework Core. In this post, we will build an ASP.NET Core MVC application that performs basic data access using Entity Framework Core. We will explore the database-first approach and see how models are created from an existing database. We will also take a look at how classes become the link between the database and ASP.NET Core MVC Controller.
  • Angular Components (With Examples)Oct 12, 2017. A Component is nothing but a simple typescript class, where you can create your own methods and properties as per your requirement which is used to bind with an UI (html or cshtml page) of our application.
  • ASP.NET Core 2.0 Session StateOct 09, 2017. Using an empty project from a previous post, amend Startup class ConfigureServicee() method, and add services for session and its backing store.
  • Why "Service Locator" is an "Anti-Pattern" for Dependency InjectionSep 29, 2017. The Service Locator is used as a replacement for the new operator. The problem with service pattern is that it hides a class's dependencies and is a bonafide anti-pattern. In fact, it takes away a developer's clarity about the class he/she is using.
  • ASP.NET Core 2.0 Error PagesSep 29, 2017. Starting from an empty project, created in a previous post, amend the Configure() method of Startup class to use middleware needed for error handling. Below I’ve used a custom middleware (defined as lambda) to handle production exceptions.
  • Create Value Object In C#Sep 28, 2017. Create a class that abstracts away (encapsulate) ‘data’ in your domain and provide methods to work on it. Below is a class I don’t consider a good Value Object.
  • Default(T) In GenericsSep 27, 2017. Default represents default value of T parameter in generics intructions. In several cases, the default keyword is an absolute unknown and we think it’s unnecessary or its functionality is null. There are many development moments with the generics classes where the default keyword can be useful.
  • Introduction To Tag Helpers In ASP.NET CoreSep 18, 2017. Tag helper is a new feature in ASP.net MVC. It enables server-side code to create and render HTML elements in Razor View. It is feature of Razor View engine. They are the C# classes which participate in view generation by creating the HTML elements. Using the tag helper, we can change the content of HTML element and add additional attributes to the HTML element. It is very similar to HTML helper in ASP.net MVC.
  • Selection Manager For WPF/MVVMSep 17, 2017. This article presents the idea and implementation of a class to manage the selection of only one element in different linear and hierarchical structures.
  • Aspect Oriented Programming In C# With RealProxy classSep 07, 2017. Example of implementing logging using RealProxy class.
  • Building A .NET Core 2.0 Class LibraryAug 31, 2017. In my previous tutorial, Getting Started with .NET Core 2.0, we learned how to build our first console app using .NET Core 2.0. We also learned how to package and deploy the application so it can be used by other users.
  • Dependency Injection - Part 3 - Implicit Vs Explicit DependenciesAug 12, 2017. If a component or class depends upon other components to complete its operations, then these other components are dependencies for this class. Our class can have these dependencies as implicit or explicit dependencies.
  • Dependency Injection - Part Two - Five Reasons To Write Loosely Coupled CodeAug 09, 2017. A loosely coupled application has good isolation among its classes, modules and assemblies. Therefore, if we make a change to one part of the application, we only need to update the relevant modules. We do not need to make changes throughout the application.
  • Dependency Injection - Part One -Tightly Coupled ApplicationAug 07, 2017. It is a best practice to use interfaces instead of concrete classes. These interfaces can then be mocked at the time of unit testing, which will prevent any call to the actual database. Also, it is a good practice to stop "newing-up" objects in classes.
  • SharePoint REST Calls With SPHttpClient Class In SPFx WebpartsJul 31, 2017. Let us look at the usage of sphttpclient in SPFx solutions for making REST calls.
  • Entity Framework CRUD Operation Performed With SQL Stored Procedure Using ADO.NET Entity Data ModelJul 31, 2017. You can see my pervious article for Entity framework with Ado.Net data Model connection and how to create a new entity framework project and sql database connection maintained with created entity framework project. Also you can see how to create a class in entity framework based on data table.
  • Built-In Filter Type In ASP.NET Core MVCJul 29, 2017. The ASP.net core framework includes five built-in filter types that we can sub-class and customize based on our requirement. The framework supports following built-in filters type.
  • Learn Web API : Using SQL Helper ClassJul 25, 2017. This article demonstrates how to use Web API Using SQL Helper Class with easy to use data base access in Visual Studio 2017.
  • Component In Angular 2 and How to Create Nested Component in Angular 2Jul 25, 2017. In this article, we will learn about Angular 2 components and we will also see how to create a nested component.
  • Code First Development Approach With Entity FrameworkJul 20, 2017. Which one to use in your project is completely your choice and also what you already have in place. Meaning are you designing/developing something from scratch or you already have got DB or domain classes, and also what are your preferences, meaning do you prefer to design classes first and then let your DB gets developed from those classes or you like to design visual class diagram first.
  • Multithreading In C# .NetJul 16, 2017. If you have a program that execute from top to bottom, it will not be responsive and feasible to build complex applications. So .Net Framework offers some classes to create complex applications.
  • Best Practices For MVCJul 14, 2017. Add a class library project to the solution, named Store.Model. This library is where we ‘ll keep all of our domain objects. Entity Framework will count on them in order to build the database but we are not going to configure Code First using DataAnnotations attributes on this project. Instead, we are going to put all the Code First configuration in specific Configuration classes using the Fluent API. Add a folder named Models.
  • How To Create A List/Library Programmatically In SharePoint 2013Jul 13, 2017. We need to install Visual Studio in our machine for creating a list using SharePoint Server Object Model. The Server Object Model will be executed in the server side & it provides a rich set of classes in representing & manipulating SharePoint objects. Server object model is like production server environment to access the data where Sharepoint is installed on the machine.
  • Simulate SharePoint Online Timer Jobs Using Azure FunctionsJul 05, 2017. SharePoint Server provides native Timer Jobs that inherit SPJobDefinition class to run at regular intervals defined in the SPSchedule object. This way we can create solutions that have to be iteratively run to process logic at regular intervals. However, in case of SharePoint Online Native Timer Jobs cannot be used.
  • Two-Class Boosted Decision TreeJul 03, 2017. Two-Class Boosted Decision Tree module creates a machine learning model that is based on the boosted decision trees algorithm. A boosted decision tree is an ensemble learning method in which the second tree corrects for the errors of the first tree, the third tree corrects for the errors of the first and second trees, and so forth. Predictions are based on the entire ensemble of trees together that make the prediction.
  • Deploying A Simple LUIS Bot Using Microsoft Azure Bot ServicesJun 28, 2017. LUIS stands For Language Understanding Intelligent Service which offers a fast and effective way of adding language understanding to applications. With LUIS, you can use pre existing, world class, pre built models from Bing and Cortana whenever they suit your purposes and when you need specialized models, LUIS guides you through the process of quickly building them.It is also part of Microsoft Cognitive Service.
  • React Tutorials - Day Three - ComponentsJun 23, 2017. Today, we will learn about components. Component are the heart of React, components let you split the UI into independent and reusable sections. In React to create a component we need to extend the “React.Component” class.
  • How To Operate With Data Persistence In Xamarin.Forms - Part TwoJun 23, 2017. In this one, I’ll show you how to use the file system to save data using Xamarin with the .Forms UI Technology and the PCL (Portable Class Library) code sharing strategy.
  • Marking Methods "Obsolete" In C# Class LibraryJun 14, 2017. In this article, I will explain how a method can be marked as obsolete in C# class library.
  • Understanding React Components On SPFxJun 13, 2017. In this article, let us see how React JS components work along with multiple class hierarchy using SharePoint Framework components.
  • Simplifying MVVM INotifyPropertyChanged On Xamarin.FormsMay 12, 2017. The goal is simplifying MVVM INotifyPropertyChanged in Xamarin Forms therefore making it unnecessary to keep inheriting base classes and handling the setter of each ViewModel Property.
  • Class And Style Bindings In Angular 2 - Part EightMay 04, 2017. In this article, we are going to learn how to bind classes and styles to HTML elements.
  • Two Class Support Vector MachineMay 03, 2017. An overview of Two Class Support Vector Machine.
  • Custom Collection Classes In C#Apr 06, 2017. This article presents an overview of custom collection classes in C#.
  • Mutable And Immutable Class In C#Mar 29, 2017. In this article, we are going to learn about mutable and immutable class in C#.
  • JavaScript Interview Day # 1 - How To Create A ClassMar 28, 2017. JavaScript interview tips - How to create a Class.
  • Overview Of List Collection Class In C#Mar 28, 2017. Overview Of List Collection Class In C#.
  • Singleton Design Pattern In C#Mar 23, 2017. In this article, we are going to learn Singleton design pattern in C#.
  • How To Organize Classes Using NamespacesMar 19, 2017. How To Organize Classes Using Namespaces.
  • How To Use The Array List Class In C#Mar 07, 2017. In this article, let's see the uses of array list classes in C#.
  • Model Class Validation Testing Using NunitFeb 15, 2017. In this article, we are going to learn about validating a Model class property that has data annotation, using Nunit.
  • Understanding Startup Class In ASP.NET CoreFeb 10, 2017. In this article you will learn about Startup Class in ASP.NET Core.
  • Send Mail Using SendGrid In .NET CoreFeb 01, 2017. Sending mail in .NET Core is not easy, as .NET Core does not support SMTPClient class. So, this article explains how we can send mail in .NET Core using SendGrid.
  • Class And Constructor In TypeScript Using Visual Studio CodeJan 23, 2017. In this article, you will learn about class and constructor in TypeScript, using Visual Studio Code.
  • Convert DateTime To String Format Using IQueryableJan 10, 2017. In this article, you will learn how to convert DateTime to string (yyyy/mm/dd) format in ViewModel/Whatever class with IQueryable.
  • Bootstrap Grid SystemDec 30, 2016. In this article, you will learn more about the Bootstrap grid system, grid class, and grid system rules.
  • C# Tutorial Part 2 - The First Error In Your ApplicationDec 28, 2016. This article gives an introduction to namespace, class, and methods used when an error occurs.
  • Using Ionic Tabs Control Classes In Visual Studio 2015Nov 27, 2016. In this article, you will learn about how to add Ionic tabs control class in Ionic app, using Visual Studio 2015.
  • Build The Ionic App With Radio Button Classes In Visual Studio 2015Nov 27, 2016. In this article, you will learn how to add Ionic Radio button in the Ionic app, using Visual Studio 2015.
  • Using Range Classes In Ionic Blank App Using Visual Studio 2015Nov 24, 2016. In this article, you will learn about how to add Range classes in Ionic app, using Visual Studio 2015
  • Working With Ionic Check Box Class In Ionic Blank App Using Visual Studio 2015Nov 24, 2016. In this article, you will learn about how to add Check Box class in Ionic app, using Visual Studio 2015.
  • Working With Ionic Toggle Classes In Ionic Blank App Using Visual Studio 2015Nov 23, 2016. In this article, we are going to see how to start using Toggle Classes in Ionic app, using Visual Studio 2015.
  • Working With Ionic List Item Class In Ionic Blank App using Visual Studio 2015Nov 17, 2016. In this article you will learn how to add List Item Class in Ionic App using Visual Studio 2015
  • Introduction To ASP.NET Core, WEB API And Repository Class- Part One Nov 16, 2016. In this article you will learn an introduction to ASP.NET Core, Web API and Repository Class.
  • Working With Button Class In Ionic Blank App Using Visual Studio 2015Nov 14, 2016. In this article, you will learn how to add button control in Ionic app, using Visual Studio 2015.
  • Working With Color Classes In Ionic Blank App Using Visual Studio 2015Nov 12, 2016. In this article, you will learn how to start using the Color classes in Ionic app, using Visual Studio 2015.
  • SharePoint Programming With TypeScript - Object Oriented ApproachNov 11, 2016. In this article, you will learn about implementing class, constructor, methods in SharePoint programming, using TypeScript.
  • Office 365/Sharepoint Online - PowerShell Script To Call Search API And Get The ResultNov 10, 2016. In this article, I will explain using KeywordQuery class from PowerShell script and writing results to .CSV files. I will also explain the scenario where we need to use Search from the PowerShell script.
  • Adding Methods In Dynamic ClassOct 06, 2016. In this article, you will learn about adding the methods in a dynamic class.
  • Using Generics With C#Sep 13, 2016. Generics cater many of the benefits of strongly typed collections as well as provide higher quality and performance boost code.
  • AngularJS DirectivesSep 12, 2016. In this article, you will learn about Directives in AngularJS.
  • Working With Singleton Design Pattern In Real Time ProjectsSep 12, 2016. In this article, you will learn, what Singleton is and how to use Singleton pattern in projects.

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