Xamarin: How to sign an Android APK file in Visual Studio for Mac for beginners

Introduction:
After an application has been coded and tested, it is necessary to prepare a package for distribution. The first task in preparing this package is to build the application for release, which mainly entails setting some application attributes. In this article, we can learn how o sign Android APK in Visual studio for Mac.

Format DatePicker value to MM/dd/yyyy or MM-dd-yyyy in Xamarin.Forms (C# - Xaml)

Introduction:
In Xamarin.Forms, we can format datepicker value to specific date format using "Format" property in Xaml or C# code. But you might be faced the issues with date format. For example if you set datepicker Format to "MM/dd/yyyy", value will be shown in different format for some devices like "MM-dd-yyyy". In this article, we can learn how to fix this issues.

Resolved: UnauthorizedAccessException for write or read file in Xamarin.Forms Android (C# - Xaml)

Introduction:

Android considers accessing external storage to be a dangerous permission, which typically requires the user to grant their permission to access the resource. The user may revoke this permission at any time. This means that a run time permission request should be performed prior to any file access. Apps are automatically granted permissions to read and write their own private files. It is possible for apps to read and write the private files that belong to other apps after being granted permission by the user.

MSAL: Azure Active Directory Authentication in Xamarin.Forms (C# - Xaml)

Introduction:
Microsoft Authentication Library (MSAL) is Latest generation of Microsoft authentication libraries. Allow you to acquire tokens for users signing-in to your application with Azure AD (work and school accounts), Microsoft (personal) accounts (MSA) and Azure AD B2C. It will also soon support a direct connection to ADFS 2019.

Visual Studio 2019 for Mac Update: Support for multiple instances

Introduction:

Visual Studio for Mac has always had support for opening multiple solutions in one window. But we’ve heard a lot of requests to support multiple windows for the IDE. Previously there is no option to open multiple instance’s of visual studio in Mac, manually I was used below command to open new instance of visual studio for mac.

Fortunately, Visual Studio for Mac now supports opening multiple instances of the IDE from the dock.

Description:

Step 1: Install latest Visual Studio 2019 for Mac from here.
Step 2: To open a new instance, right-click on the icon in the dock and select New Instance:

Reference: https://docs.microsoft.com/en-us/visualstudio/releasenotes/vs2019-mac-relnotes

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Xamarin.Forms: How To Change GitHub Repository Language For C# Projects

Introduction:
We all know that Xamarin.Forms programming language is "C#". But I was struggling to get my GitHub repository to show my Xamarin.Forms project as “C#” and not as Java/other language. If you have this same problem, this article can teach you about "how to manually change GitHub repository language for xamarin.forms project to Csharp Language".

Hide ScrollView scrollbar in Xamarin.Forms (C# - Xaml)

Introduction:
A Xamarin.Forms ScrollView contains layouts and enables them to scroll offscreen. There are some situations when we want to hide default vertical/horizontal scrollbar for ScrollView in xamarin.forms. So we can learn it from this article.

Hide Listview scrollbar in Xamarin.Forms (C# - Xaml)

Introduction:
A Xamarin.Forms ListView is a view that displays a collection of data as a vertical list. There are some situations when we want to hide default vertical/horizontal scrollbar for listview in xamarin.forms. So we can learn it from this article.

How to read local json file and display in Xamarin.Forms (C# - Xaml)

Introduction:
There are some situations when we want to parse and extract information from local json file which is inside of your project. You can also read one of my Json Parsing article which describes about parsing JSON response from RestAPI instead of local project file.

Resolved: The type or namespace name 'App' could not be found (are you missing a using directive or an assembly reference?) (Error: CS0246)

Introduction:
There is common error in xamarin.forms project when you trying to build solution for android or iOS.

"Error: The type or namespace name 'App' could not be found (are you missing a using directive or an assembly reference?) (CS0246)"

HtmlAgilityPack: Html parsing in Xamarin.Forms (C# - Xaml)

Introduction:
There are some situations when we want to parse and extract information from an HTML page instead of rendering it. In this case, we can use HtmlAgilityPack nuget package because it has a set of powerful API very easy to use. In this post, we will discuss how to set up an Xamarin.Forms project that uses HtmlAgilityPack and how to extract information from an HTML string.

Resolved: RootViewController.PresentViewController is not working in Xamarin iOS (C#)

Introduction:
Some times we may get a situation where we need to present a UINavigationController modally and then push UIViewControllers within the UINavigationController. This required to start with the key window's root view controller and then find the most-presented view controller.