A lightweight, extensible, open-source, and cross-platform version of the Entity Framework data access technology.
How to use DateTime in LINQ when it's NULL
create table mytable (Birth datetime null) public class myModel { public Datetime Birth { get; set; } } var query = from aa in mydb.mytable select new cmyModel { Birth = aa.Birth } I get a message: Nullable object must have a value; If I make the data…
Developer technologies | .NET | Entity Framework Core
how to fix The service System.Windows.Forms.Design.IEventHandlerService already exists in the service container. Parameter name: serviceType
How do I identify the source of the error The service System.Windows.Forms.Design.IEventHandlerService already exists in the service container. Parameter name: serviceType -------- The service System.Windows.Forms.Design.IEventHandlerService…
Developer technologies | Windows Forms
A set of .NET Framework managed libraries for developing graphical user interfaces.
AI answer
.NET Framework 3.5 offline install for Win 10 1809 (OS build 17763.107) Enterprise LTSC
Screenshot 2026-11-13 105647.png Hi, I need to install .NET Framework 3.5 on OFFLINE PC with Win 10 1809 (OS build 17763.107) Enterprise LTSC. Unfortunately I don't have ISO image file for this windows version, and also I can't find download link…
Developer technologies | .NET | Other
Microsoft Technologies based on the .NET software framework. Miscellaneous topics that do not fit into specific categories.
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VS 2022 Windows 11 ARM64 EF Diagram failes missing GraphObject DLL
I updated my machine to a MAC Studio M1 and am running parallels with Windows 11 ARM. I am using Visual Studio 2022. On the new machine everything works BUT in the DAO/EF class the EDMX won't load the diagram. Error says…
Windows for business | Windows Client for IT Pros | User experience | Other
Developer technologies | .NET | Other
Microsoft Technologies based on the .NET software framework. Miscellaneous topics that do not fit into specific categories.
Developer technologies | Visual Studio | Other
A family of Microsoft suites of integrated development tools for building applications for Windows, the web, mobile devices and many other platforms. Miscellaneous topics that do not fit into specific categories.
VisualStudio.vsman size / SHA-256 mismatch across supported channels request authoritative validation procedure
We are preparing a reproducible Windows AMD64 build-toolchain acquisition. Before downloading or running compiler/install packages, we compare each catalogue’s downloaded bytes with the size and SHA-256 advertised in its official channel manifest. On 13…
Developer technologies | Visual Studio | Setup
The process of installing, configuring, and customizing Visual Studio to support development workflows across languages, platforms, and workloads.
ASP.NET Core .NET 8 receives null form values from certain iPhone 13 Pro Max devices
I am troubleshooting a device-specific issue with multipart form data submission in my ASP.NET Core .NET 8 application. Application details The frontend uses vanilla JavaScript fetch with the FormData API to submit customer information and uploaded…
Developer technologies | ASP.NET Core | Other
A set of technologies in .NET for building web applications and web services. Miscellaneous topics that do not fit into specific categories.
.NET 10 documentation for SerializeToUtf8Bytes
Could you point me to an official reference that establishes what applies to .NET 10 for the System.Text.Json.JsonSerializer.SerializeToUtf8Bytes<TValue>(TValue, JsonSerializerOptions) overload? The specific statement I’d like to verify is that…
Developer technologies | .NET | .NET Runtime
.NET: Microsoft Technologies based on the .NET software framework. Runtime: An environment required to run apps that aren't compiled to machine language.
Learning courses or books for "building .NET MAUI Blazor Hybirdand web app"
I want to create a new project using this visual studio template:- but i am having troubles finding online courses, books or online documentation targeting this specific template? any advice and help in my learning journey ? Thanks
Developer technologies | .NET | .NET Multi-platform App UI
A Microsoft open-source framework for building native device applications spanning mobile, tablet, and desktop.
Visual Studio Build Tools 2022 17.14.45: VisualStudio.vsman size and SHA-256 mismatch
Product: Visual Studio Build Tools 2022 Version: 17.14.45 (build 17.14.37906.3) Channel: Current Affected catalog: VisualStudio.vsman I am attempting to independently verify the integrity of the official Microsoft distribution before installation. The…
Developer technologies | Visual Studio | Setup
The process of installing, configuring, and customizing Visual Studio to support development workflows across languages, platforms, and workloads.
Microsoft Graph - Not able to assign manager to a user
Hi, Im having issues when trying to assign a user as a manger to a another user. Here is my solution: private async Task<GraphResponse> UpdateUserWithManagerAsync(GraphServiceClient client, AdUser user, AdUser manager) { …
Microsoft Security | Microsoft Graph
An API that connects multiple Microsoft services, enabling data access and automation across platforms
Developer technologies | C#
An object-oriented and type-safe programming language that has its roots in the C family of languages and includes support for component-oriented programming.
Login failed for User
I get "Login failed for User" error in visual basic connection to sql-server. This error occurs when I move my database from one PC to another. I solve this problem by using same "PC-name" & "User-Name" of my old PC…
Developer technologies | VB
An object-oriented programming language developed by Microsoft that can be used in .NET.
SQL Server | Other
Additional SQL Server features and topics not covered by specific categories
Combo box does not update
Hello I am building a wpf app, using MVVM (I already imported MVVM.Helpers) I am trying to fill a list with 5000 numbers, and put in in a commbo box, and for some reason is not working my app: https://github.com/eduardoagr/RsidentsManager …
Developer technologies | Windows Presentation Foundation
A part of the .NET Framework that provides a unified programming model for building line-of-business desktop applications on Windows.
Developer technologies | XAML
A language based on Extensible Markup Language (XML) that enables developers to specify a hierarchy of objects with a set of properties and logic.
Does Dotnet Net 6 Arm64 work on M1 Silicon ?
When I tried using Scaffold Dbcontext, it show there is no such a word as " scaffold dbcontext". Then I uninstalled Net 6 and installed Arm64 version on m y M1 silicon. Guess what ? It didn't work because when checked botnet version, it…
Developer technologies | .NET | .NET Runtime
.NET: Microsoft Technologies based on the .NET software framework. Runtime: An environment required to run apps that aren't compiled to machine language.
Developer technologies | ASP.NET Core | Other
A set of technologies in .NET for building web applications and web services. Miscellaneous topics that do not fit into specific categories.
JWT Token Expiration and Authorization
I am working with a JWT in .Net Core 6.0 Web Api. I am struggling with JWT expiration time...not sure if it is being set correctly with the UTC being different from my loacl time. But I also am having an issue with not being able to run an API Method…
Developer technologies | .NET | Entity Framework Core
A lightweight, extensible, open-source, and cross-platform version of the Entity Framework data access technology.
Microsoft Security | Microsoft Identity Manager
A tool for managing user identities, credentials, and access across on-premises and cloud environments
Developer technologies | ASP.NET Core | Other
A set of technologies in .NET for building web applications and web services. Miscellaneous topics that do not fit into specific categories.
How do I convert a UWP application to use Azure Maps?
I maintain a large UWP application that uses MapControl (from Windows.UI.Xaml.Controls.Maps). I didn't know that Bing map tokens were being retired until I started seeing a "MapServiceToken not specified" warning in my map views a few days…
Developer technologies | Universal Windows Platform (UWP)
A Microsoft platform for building and publishing apps for Windows devices.
Working with Dotnet and Sql edge on M1 mac nuget packages
Hello, Im new to mac, I have an M1 mac mini, Im using Visual Studio for M1 mac as well Recently I have Installed docker with sql edge container in it. In order to make my Web API projects more efficient, I couldn't figure it out if I need some…
SQL Server on Azure Virtual Machines
An Azure service that is used to provision Windows and Linux virtual machines.
Developer technologies | .NET | Other
Microsoft Technologies based on the .NET software framework. Miscellaneous topics that do not fit into specific categories.
Developer technologies | C#
An object-oriented and type-safe programming language that has its roots in the C family of languages and includes support for component-oriented programming.
Developer technologies | ASP.NET Core | ASP.NET API
A component of ASP.NET Core for creating RESTful web services that support HTTP-based communication between clients and servers.
WebApi - ApiKey plus JWT
I completed a couple of projects that are implemented in C# .Net 6.0 MVC, and now I'm trying to do my first web API project. This WebApi is implemented in .Net 6.0, with JWT authorization. Everything is working smoothly so far, the token is generated…
Developer technologies | ASP.NET Core | Other
A set of technologies in .NET for building web applications and web services. Miscellaneous topics that do not fit into specific categories.
Developer technologies | ASP.NET Core | ASP.NET API
A component of ASP.NET Core for creating RESTful web services that support HTTP-based communication between clients and servers.
Connect .Net project to a website
Hi everyone, I want to login to a website (any website with a login screen) but instead of typing my credentials into a website's login text fields, I want my C# code to do it for me automatically. The issue is that I don't know how to connect my…
Developer technologies | C#
An object-oriented and type-safe programming language that has its roots in the C family of languages and includes support for component-oriented programming.
Use of IS_MEMBER function with multiple databases
Hi, I'm having the following problem cenario: 1 -StoreProcedure A in database A calls Function B from Database B 2- Function B: Return IS_MEMBER('ROLE') 3- the current user is a member of 'ROLE' on database B and not a member on Database A …
Developer technologies | Transact-SQL
A Microsoft extension to the ANSI SQL language that includes procedural programming, local variables, and various support functions.
How do I create a view using existing tables from another database just like using dblinks?
Hi experts, Would like to kindly ask for help with creating a view using a query that selects from tables from another database in the same server. Thanks!
Developer technologies | Transact-SQL
A Microsoft extension to the ANSI SQL language that includes procedural programming, local variables, and various support functions.
SQL Server | Other
Additional SQL Server features and topics not covered by specific categories