Solved Solutions to computer programming Errors

InvalidOperation: The connection was not closed. The connections current state is connecting

ENTITY FRAMEWORK
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NotSupportedException: Path 'wwwroot myfolder file

.NET 7
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NotSupportedException: Path 'wwwroot myfolder filename.txt' was not rooted

.NET 7
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SqlException: A connection was successfully establ

.NET 7
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SqlException: A connection was successfully established with the server, but then an error occurred during the login process. (provider: SSL Provider, error: 0 - The certificate chain was issued by an authority that is not trusted.)

.NET 7
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Error unprotecting the session cookie

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Error unprotecting the session cookie

QUESTIONS
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_context.ChangeTracker 'threw an exception of type

.NET 7
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_context.ChangeTracker 'threw an exception of type 'System.ObjectDisposedException'

.NET 7
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AspNet MVC ViewData Error: InvalidOperationExcepti

QUESTIONS
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AspNet MVC ViewData Error: InvalidOperationException: There is no ViewData item of type 'IEnumerable<SelectListItem>' that has key 'Type'

QUESTIONS
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InvalidOperationExecption: The property 'EntityNam

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InvalidOperationExecption: The property 'EntityName.Id' is part of a key and so cannot be modified or marked as modified.

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WPF Error: System.InvalidOperationException 'The c

QUESTIONS
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WPF Error: System.InvalidOperationException 'The calling thread cannot access this object because a different thread owns it.'

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Why is AspNet 6 System DateTime showing Chinese Ch

.NET 7
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Why is AspNet 6 System DateTime showing Chinese Characters

.NET 7
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The type namespace QuickGrid could not be found

.NET 5
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The type namespace QuickGrid could not be found

.NET 5
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Why is dotnet watch run not showing changes in the

.NET 7
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Why is dotnet watch run not showing changes in the View or Razor Pages

.NET 7
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'Windows-1252' is not a supported encoding name. F

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'Windows-1252' is not a supported encoding name. For information on defining a custom encoding see the documentation for the Encoding.RegisterProvider method

QUESTIONS
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Return url is required

.NET 7
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Return url is required

.NET 7
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Exited with error code -532462766

.NET 7
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Exited with error code -532462766

.NET 7
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Unable to stop debugging. Operation not supported.

.NET 7
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Unable to stop debugging. Operation not supported. Unknown error: 0x800004005

.NET 7
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Asp.Net MVC Development Notes

.NET 7
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Asp.Net MVC Development Notes

.NET 7
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ASP.NET 8 Best Practices: Coding, Performance Tips

.NET 7
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ASP.NET 8 Best Practices: Coding, Performance Tips, and Tricks

.NET 7
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[Solved] Entity Framework Core (EF 6) Error: Unabl

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[Solved] Entity Framework Core (EF 6) Error: Unable to track an entity of type 'YourModalName' because primary key property 'id' is null.

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InvalidOperationException: No service for type Mic

.NET 7
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InvalidOperationException: No service for type Microsoft AspNetCore Identity UserManager 1[Microsoft AspNetCore identity IdentityUser] has been registered

.NET 7
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How to Sign Out a User when Session Expires in Asp

.NET 7
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How to Sign Out a User when Session Expires in AspNetCore

.NET 7
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RuntimeBinderException: 'System.Dynamic.DynamicObj

.NET 7
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RuntimeBinderException: 'System.Dynamic.DynamicObject'does not contain a definition for 'Modal'

.NET 7
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How to Keep Decimal (in Cents) Precision without T

.NET 7
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How to Keep Decimal (in Cents) Precision without Truncating Zeros e.g. 0.04 as to 0.4

.NET 7
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Cannot consume scoped service Microsoft.AspNetCore

.NET 7
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Cannot consume scoped service Microsoft.AspNetCore.Identity.IRoleStore from singleton 'Microsoft.AspNetCore.Identity.RoleManager

.NET 7
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found multiple publish output files with the same

.NET 7
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found multiple publish output files with the same relative path "Conflict resolution target" Publishing AspNet 6 in Visual Studio 2022

.NET 7
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How to Connect Pyramid Cash Acceptor in Windows 10

WINDOWS
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How to Connect Pyramid Cash Acceptor in Windows 10 (APEX 7000 Series)

WINDOWS
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System.TypeInitializationException: The type initi

LUNUX
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System.TypeInitializationException: The type initializer for 'Gdip' threw an exception

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What is Async Await in AspNet 6 (C-Sharp)

.NET 7
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What is Async Await in AspNet 6 (C-Sharp)

.NET 7
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Docker Container AspNet Runtime DateTime is Wrong

DOCKER
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Docker Container AspNet Runtime DateTime is Wrong

DOCKER
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'IHtmlHelper dynamic' has no applicable method nam

.NET 7
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'IHtmlHelper dynamic' has no applicable method named 'PartialAsync'

.NET 7
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How to Solve XUnit Automated Testing Error: Castle

MVC
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How to Solve XUnit Automated Testing Error: Castle DynamicProxy InvalidProxyConstructorArgumentsException

MVC
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error : MSB4803: The task "ResolveComReference" is

.NET 7
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error : MSB4803: The task "ResolveComReference" is not supported on the .NET Core version of MSBuild. Please use the .NET Framework version of MSBuild

.NET 7
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Asp.Net 5 Development Notes (DotNet Core 3.1 Study

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Asp.Net 5 Development Notes (DotNet Core 3.1 Study Notes)

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[HTTP Error 500.30]: Failed to load coreclr.Except

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[HTTP Error 500.30]: Failed to load coreclr.Exception message CLR worker thread exited prematurely

SERVERS
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Chapter 6: Building a Supportive Community

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Chapter 6: Building a Supportive Community

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MVC Asp Net 6 System Design

SYSTEM DESIGN
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MVC Asp Net 6 System Design

SYSTEM DESIGN
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[hot reload not working] hot reload only works whe

.NET 7
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[hot reload not working] hot reload only works when saving css or svg files in visual studio 2019

.NET 7
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MSB1009: Docker File Error when building Asp.Net 5

.NET 7
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MSB1009: Docker File Error when building Asp.Net 5

.NET 7
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The 'Microsoft.AspNetCore.Mvc.ViewFeature.Infrastr

.NET 7
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The 'Microsoft.AspNetCore.Mvc.ViewFeature.Infrastructure.DefaultTempDataSerializer' cannot serialize an object of type 'System.Decimal'

.NET 7
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Web API 415: Unsupported Media Type

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Web API 415: Unsupported Media Type

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How to Debug Asp.Net Core 3.1 in IIS Development E

.NET 7
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How to Debug Asp.Net Core 3.1 in IIS Development Environment Variable

.NET 7
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Mvc authorization attribute not working AspNet 6

.NET 7
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Mvc authorization attribute not working AspNet 6

.NET 7
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SqlException: New transaction is not allowed becau

.NET 7
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SqlException: New transaction is not allowed because there are other threads running in the session

.NET 7
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An Exception occurred in the database while saving

.NET 7
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An Exception occurred in the database while saving changes for context type 'ContextType' Microsoft.Data.SqlClient.SqlException (0x80131904)

.NET 7
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Performance Tuning for ASP.NET Web Applications

.NET 7
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Performance Tuning for ASP.NET Web Applications

.NET 7
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Should I use Configurer Await False in AspNet 6

.NET 7
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Should I use Configurer Await False in AspNet 6

.NET 7
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Asp.Net 6

Scaling Asp.Net 6 Application using Docker Swarm

Scaling Asp.Net 6 Application using Docker Swarm

What is Entity Framework Navigation in Asp.Net 6

What is Entity Framework Navigation in Asp.Net 6

How to upgrade Asp.Net 5 Application to Asp.Net 6

How to upgrade Asp.Net 5 Application to Asp.Net 6 Nuget Packages not upgrading

Check if url contains text in C# (asp.net 6)

Check if url contains text in C# (asp.net 6)

Why is AspNet 6 Application always running in Prod

Why is AspNet 6 Application always running in Production Mode

InvalidOperation: The connection was not closed. T

InvalidOperation: The connection was not closed. The connections current state is connecting

NotSupportedException: Path 'wwwroot myfolder file

NotSupportedException: Path 'wwwroot myfolder filename.txt' was not rooted

SqlException: A connection was successfully establ

SqlException: A connection was successfully established with the server, but then an error occurred during the login process. (provider: SSL Provider, error: 0 - The certificate chain was issued by an authority that is not trusted.)

Error unprotecting the session cookie

Error unprotecting the session cookie

_context.ChangeTracker 'threw an exception of type

_context.ChangeTracker 'threw an exception of type 'System.ObjectDisposedException'

AspNet MVC ViewData Error: InvalidOperationExcepti

AspNet MVC ViewData Error: InvalidOperationException: There is no ViewData item of type 'IEnumerable<SelectListItem>' that has key 'Type'

InvalidOperationExecption: The property 'EntityNam

InvalidOperationExecption: The property 'EntityName.Id' is part of a key and so cannot be modified or marked as modified.

WPF Error: System.InvalidOperationException 'The c

WPF Error: System.InvalidOperationException 'The calling thread cannot access this object because a different thread owns it.'

Why is AspNet 6 System DateTime showing Chinese Ch

Why is AspNet 6 System DateTime showing Chinese Characters

The type namespace QuickGrid could not be found

The type namespace QuickGrid could not be found

Why is dotnet watch run not showing changes in the

Why is dotnet watch run not showing changes in the View or Razor Pages

'Windows-1252' is not a supported encoding name. F

'Windows-1252' is not a supported encoding name. For information on defining a custom encoding see the documentation for the Encoding.RegisterProvider method

Return url is required

Return url is required

Exited with error code -532462766

Exited with error code -532462766

Unable to stop debugging. Operation not supported.

Unable to stop debugging. Operation not supported. Unknown error: 0x800004005

Asp.Net MVC Development Notes

Asp.Net MVC Development Notes

ASP.NET 8 Best Practices: Coding, Performance Tips

ASP.NET 8 Best Practices: Coding, Performance Tips, and Tricks

[Solved] Entity Framework Core (EF 6) Error: Unabl

[Solved] Entity Framework Core (EF 6) Error: Unable to track an entity of type 'YourModalName' because primary key property 'id' is null.

InvalidOperationException: No service for type Mic

InvalidOperationException: No service for type Microsoft AspNetCore Identity UserManager 1[Microsoft AspNetCore identity IdentityUser] has been registered

How to Sign Out a User when Session Expires in Asp

How to Sign Out a User when Session Expires in AspNetCore

RuntimeBinderException: 'System.Dynamic.DynamicObj

RuntimeBinderException: 'System.Dynamic.DynamicObject'does not contain a definition for 'Modal'

How to Keep Decimal (in Cents) Precision without T

How to Keep Decimal (in Cents) Precision without Truncating Zeros e.g. 0.04 as to 0.4

Cannot consume scoped service Microsoft.AspNetCore

Cannot consume scoped service Microsoft.AspNetCore.Identity.IRoleStore from singleton 'Microsoft.AspNetCore.Identity.RoleManager

found multiple publish output files with the same

found multiple publish output files with the same relative path "Conflict resolution target" Publishing AspNet 6 in Visual Studio 2022

How to Connect Pyramid Cash Acceptor in Windows 10

How to Connect Pyramid Cash Acceptor in Windows 10 (APEX 7000 Series)

System.TypeInitializationException: The type initi

System.TypeInitializationException: The type initializer for 'Gdip' threw an exception

What is Async Await in AspNet 6 (C-Sharp)

What is Async Await in AspNet 6 (C-Sharp)

Docker Container AspNet Runtime DateTime is Wrong

Docker Container AspNet Runtime DateTime is Wrong

'IHtmlHelper dynamic' has no applicable method nam

'IHtmlHelper dynamic' has no applicable method named 'PartialAsync'

How to Solve XUnit Automated Testing Error: Castle

How to Solve XUnit Automated Testing Error: Castle DynamicProxy InvalidProxyConstructorArgumentsException

error : MSB4803: The task "ResolveComReference" is

error : MSB4803: The task "ResolveComReference" is not supported on the .NET Core version of MSBuild. Please use the .NET Framework version of MSBuild

Asp.Net 5 Development Notes (DotNet Core 3.1 Study

Asp.Net 5 Development Notes (DotNet Core 3.1 Study Notes)

[HTTP Error 500.30]: Failed to load coreclr.Except

[HTTP Error 500.30]: Failed to load coreclr.Exception message CLR worker thread exited prematurely

Chapter 6: Building a Supportive Community

Chapter 6: Building a Supportive Community

MVC Asp Net 6 System Design