Solved Solutions to computer programming Errors

InvalidOperationException, A second operation star

ENTITY FRAMEWORK
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InvalidOperationException, A second operation started on this context before a previous operation completed.

ENTITY FRAMEWORK
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XmlException: The ':' character, hexadecimal value

XML
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XmlException: The ':' character, hexadecimal value 0x3A, cannot be included in a name

XML
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Solved!! Dot Net Core 3.1 Error: Inspecting the state of an object in the debuggee of type System.Reflection.MethodBase is not supported in this context

DATABASES
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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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Ionic Cordova App Error(Stack on [Trans-pile Start

ANDROID
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Ionic Cordova App Error(Stack on [Trans-pile Started])

ANDROID
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The ONNX Runtime extensions library was not found

RESEARCH
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The ONNX Runtime extensions library was not found. The Microsoft.ML.OnnxRuntime.Extensions NuGet package must be referenced by the project to use OrtExtensions.RegisterCustomOps

RESEARCH
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setInterval in JavaScript not working

JAVASCRIPT
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setInterval in JavaScript not working

JAVASCRIPT
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Asp.Net Core EF Core Error: Cannot access a dispos

ENTITY FRAMEWORK
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Asp.Net Core EF Core Error: Cannot access a disposed object. A common cause of this error is disposing a context that was resolved from dependency injection and then later trying to use the same context instance elsewhere in your application. This may occur if you are calling Dispose() on the context, or wrapping the context in a using statement. If you are using dependency injection, you should let the dependency injection container take care of disposing context instances.

ENTITY FRAMEWORK
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ObjectDisposedException: Cannot access a disposed

.NET 7
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ObjectDisposedException: Cannot access a disposed context instance. A common cause of this error is disposing a context instance that was resolved from dependency injection and then later trying to use the same context instance elsewhere in your application

.NET 7
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System.ObjectDisposedException: Cannot access a di

System.ObjectDisposedException: Cannot access a disposed context instance. A common cause of this error is disposing a context instance that was resolved from dependecy injection and then later trying to use the same context instance elsewhere in your application.

OTHER
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The instance of entity type 'IdentityUserLogin<str

.NET 7
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The instance of entity type 'IdentityUserLogin<string>' cannot be tracked because another instance with the same key value for {'LoginProvider', 'ProviderKey'} is already being tracked

.NET 7
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Microsoft.EntityFrameworkCore.Database.Transaction

ENTITY FRAMEWORK
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Microsoft.EntityFrameworkCore.Database.Transaction[20205] An error occurred using a transaction.

ENTITY FRAMEWORK
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_context.SaveChanges is not working

ENTITY FRAMEWORK
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_context.SaveChanges is not working

ENTITY FRAMEWORK
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Razor MVC Error : An Expression Tree may not conta

.NET 7
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Razor MVC Error : An Expression Tree may not contain a dynamic operation

.NET 7
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Proxmox Cluster won't start [no corum]

SERVERS
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Proxmox Cluster won't start [no corum]

SERVERS
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Software Development Good Practices

.NET 7
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Software Development Good Practices

.NET 7
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Machine Learning Notes

MACHINE LEARNING
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Machine Learning Notes

MACHINE LEARNING
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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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What is New in Asp Net 7 and EF Core 7 (Best Featu

RESEARCH
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What is New in Asp Net 7 and EF Core 7 (Best Features)

RESEARCH
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errorCode":"ERR_DIRECT_INVOKE","message":"failed g

DOCKER-COMPOSE
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errorCode":"ERR_DIRECT_INVOKE","message":"failed getting app id either from the URL path or the header dapr-app-id

DOCKER-COMPOSE
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Asp.Net Core 3.1 Entity Framwork Database Context

.NET 7
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Asp.Net Core 3.1 Entity Framwork Database Context Error: System.ObjectDisposedException: 'Cannot access a disposed object

.NET 7
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Asp.Net Core 3.1 Identity Error:InvalidOperationEx

.NET 7
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Asp.Net Core 3.1 Identity Error:InvalidOperationException: Cannot create a DbSet for 'ClassModal' because this type is not included in the model for the context

.NET 7
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Understanding ASP.Net Core 2.2 Database Context C

.NET 7
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Understanding ASP.Net Core 2.2 Database Context Class

.NET 7
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Http/2 Awesome read

NETWORK
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Http/2 Awesome read

NETWORK
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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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Here is what is going on this week at ErnesTech.co

GENERAL
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Here is what is going on this week at ErnesTech.com

GENERAL
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Visual Studio error "Attempted TextBuffer edit ope

TECHNOLOGY
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Visual Studio error "Attempted TextBuffer edit operation while another edit is in progress"

TECHNOLOGY
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[Solved] Asp.Net 5 Error: error RZ2008: Attribute

.NET 7
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[Solved] Asp.Net 5 Error: error RZ2008: Attribute 'asp-for' on tag helper element 'label' requires a value

.NET 7
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Microsoft Data SqlClient SqlException (0x80131904)

ENTITY FRAMEWORK
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Microsoft Data SqlClient SqlException (0x80131904) New transaction is not allowed because there are other threads running in the session

ENTITY FRAMEWORK
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docker: Cannot connect to the Docker daemon at uni

DOCKER
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docker: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?.

DOCKER
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Cannot create a DbSet for "MyModal" because this t

.NET 7
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Cannot create a DbSet for "MyModal" because this type is not included in the model for the context. However the model contains an entity type with the same name in a different namespace

.NET 7
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What is a Transformer in Machine-Learning

MACHINE LEARNING
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What is a Transformer in Machine-Learning

MACHINE LEARNING
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SqlNullValueException: Data is Null. This method o

ENTITY FRAMEWORK
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SqlNullValueException: Data is Null. This method or property cannot be called on Null values

ENTITY FRAMEWORK
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InvalidOperationException: The required column 'Ca

ENTITY FRAMEWORK
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InvalidOperationException: The required column 'Categoryid' was not present in the results of a 'FromSql' operation

ENTITY FRAMEWORK
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Why you should choose HomeAssistant as your Home A

RESEARCH
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Why you should choose HomeAssistant as your Home Automation Software

RESEARCH
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Machine Learning Best Resources

MACHINE LEARNING
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Machine Learning Best Resources

MACHINE LEARNING
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ERROR! The requested handler 'restart ufw' was not

SERVERS
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ERROR! The requested handler 'restart ufw' was not found in either the main handlers list nor in the listening handlers list

SERVERS
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$(...).modal is not a function

TECHNOLOGY
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$(...).modal is not a function

TECHNOLOGY
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Microsoft SQL Server, Error: 258

SQL
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Microsoft SQL Server, Error: 258

SQL
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Asp.Net Core 3.1 Razor View Error: CS1963: An expr

.NET 7
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Asp.Net Core 3.1 Razor View Error: CS1963: An expression tree may not contain a dynamic operation

.NET 7
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How to Add Cookies to the Http Response in AspNet

.NET 7
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How to Add Cookies to the Http Response in AspNet 6 MVC

.NET 7
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[Solved]: Invalid version: 16. (Microsoft.SqlServe

[Solved]: Invalid version: 16. (Microsoft.SqlServer.Smo)

OTHER
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can't ping a computer on network

HARDWARE
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can't ping a computer on network

HARDWARE
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How I solved ionic serve that did not work [Solve

ANDROID
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How I solved ionic serve that did not work [Solve Ionic Transpile Problem]

ANDROID
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[AspNet 5 Entity Framework 6 Error] InvalidOperati

.NET 7
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[AspNet 5 Entity Framework 6 Error] InvalidOperationException: The property "ModelName.Id" has a temporary value while attempting to change the entity's state to "Modified". Either set a permanent value explicitly, or ensure that the database is configured to generate values for this property.

.NET 7
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You don't want to miss out on this [New Book is no

GENERAL
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You don't want to miss out on this [New Book is now available]

GENERAL
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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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[Solved] InvalidOperationException: The entity typ

MVC
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[Solved] InvalidOperationException: The entity type 'TableNameOrModelName' requires a primary key to be defined. If you intended to use a keyless entity type call 'HasNoKey()'.

MVC
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Asp.Net Adding Object to Database Error: Collectio

.NET 7
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Asp.Net Adding Object to Database Error: Collection was modified; enumeration operation may not execute

.NET 7
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A second operation started on this context

InvalidOperationException, A second operation star

InvalidOperationException, A second operation started on this context before a previous operation completed.

XmlException: The ':' character, hexadecimal value

XmlException: The ':' character, hexadecimal value 0x3A, cannot be included in a name

The name 'Category' does not exist in the current

The name 'Category' does not exist in the current context

Solved!! Dot Net Core 3.1 Error: Inspecting the st

Solved!! Dot Net Core 3.1 Error: Inspecting the state of an object in the debuggee of type System.Reflection.MethodBase is not supported in this context

SqlException: New transaction is not allowed becau

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

Ionic Cordova App Error(Stack on [Trans-pile Start

Ionic Cordova App Error(Stack on [Trans-pile Started])

The ONNX Runtime extensions library was not found

The ONNX Runtime extensions library was not found. The Microsoft.ML.OnnxRuntime.Extensions NuGet package must be referenced by the project to use OrtExtensions.RegisterCustomOps

setInterval in JavaScript not working

setInterval in JavaScript not working

Asp.Net Core EF Core Error: Cannot access a dispos

ObjectDisposedException: Cannot access a disposed

ObjectDisposedException: Cannot access a disposed context instance. A common cause of this error is disposing a context instance that was resolved from dependency injection and then later trying to use the same context instance elsewhere in your application

System.ObjectDisposedException: Cannot access a di

System.ObjectDisposedException: Cannot access a disposed context instance. A common cause of this error is disposing a context instance that was resolved from dependecy injection and then later trying to use the same context instance elsewhere in your application.

The instance of entity type 'IdentityUserLogin<str

The instance of entity type 'IdentityUserLogin<string>' cannot be tracked because another instance with the same key value for {'LoginProvider', 'ProviderKey'} is already being tracked

Microsoft.EntityFrameworkCore.Database.Transaction

Microsoft.EntityFrameworkCore.Database.Transaction[20205] An error occurred using a transaction.

_context.SaveChanges is not working

_context.SaveChanges is not working

Razor MVC Error : An Expression Tree may not conta

Razor MVC Error : An Expression Tree may not contain a dynamic operation

Proxmox Cluster won't start [no corum]

Proxmox Cluster won't start [no corum]

Software Development Good Practices

Software Development Good Practices

Machine Learning Notes

Machine Learning Notes

Unable to stop debugging. Operation not supported.

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

What is New in Asp Net 7 and EF Core 7 (Best Featu

What is New in Asp Net 7 and EF Core 7 (Best Features)

errorCode":"ERR_DIRECT_INVOKE","message":"failed g

errorCode":"ERR_DIRECT_INVOKE","message":"failed getting app id either from the URL path or the header dapr-app-id

Asp.Net Core 3.1 Entity Framwork Database Context

Asp.Net Core 3.1 Entity Framwork Database Context Error: System.ObjectDisposedException: 'Cannot access a disposed object

Asp.Net Core 3.1 Identity Error:InvalidOperationEx

Asp.Net Core 3.1 Identity Error:InvalidOperationException: Cannot create a DbSet for 'ClassModal' because this type is not included in the model for the context

Understanding ASP.Net Core 2.2 Database Context C

Understanding ASP.Net Core 2.2 Database Context Class

Http/2 Awesome read

Http/2 Awesome read

An Exception occurred in the database while saving

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

Here is what is going on this week at ErnesTech.co

Here is what is going on this week at ErnesTech.com

Visual Studio error "Attempted TextBuffer edit ope

Visual Studio error "Attempted TextBuffer edit operation while another edit is in progress"

[Solved] Asp.Net 5 Error: error RZ2008: Attribute

[Solved] Asp.Net 5 Error: error RZ2008: Attribute 'asp-for' on tag helper element 'label' requires a value

Microsoft Data SqlClient SqlException (0x80131904)

Microsoft Data SqlClient SqlException (0x80131904) New transaction is not allowed because there are other threads running in the session

docker: Cannot connect to the Docker daemon at uni

docker: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?.

Cannot create a DbSet for "MyModal" because this t

Cannot create a DbSet for "MyModal" because this type is not included in the model for the context. However the model contains an entity type with the same name in a different namespace

What is a Transformer in Machine-Learning

What is a Transformer in Machine-Learning

SqlNullValueException: Data is Null. This method o

SqlNullValueException: Data is Null. This method or property cannot be called on Null values

InvalidOperationException: The required column 'Ca

InvalidOperationException: The required column 'Categoryid' was not present in the results of a 'FromSql' operation

Why you should choose HomeAssistant as your Home A

Why you should choose HomeAssistant as your Home Automation Software

Machine Learning Best Resources

Machine Learning Best Resources

ERROR! The requested handler 'restart ufw' was not

ERROR! The requested handler 'restart ufw' was not found in either the main handlers list nor in the listening handlers list

$(...).modal is not a function

$(...).modal is not a function

Microsoft SQL Server, Error: 258

Microsoft SQL Server, Error: 258