Solved Solutions to computer programming Errors

InvalidOperationException: The 'Microsoft.AspNetCo

.NET 7
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InvalidOperationException: The 'Microsoft.AspNetCore.Mvc.ViewFeatures.Infrastructure.DefaultTempDataSerializer' cannot serialize an object of type 'System.Collections.Generic.List`1

.NET 7
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InvalidOperationException: The 'Microsoft.AspNetCo

QUESTIONS
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InvalidOperationException: The 'Microsoft.AspNetCore.Mvc.ViewFeatures.Infrastructure.DefaultTempDataSerializer' cannot serialize an object of type 'System.Collections.Generic.List`1

QUESTIONS
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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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InvalidOperationException: The model item passed into the ViewDataDictionary is of type 'System.Collections.Generic.List`1', but this ViewDataDictionary instance requires a model item of type 'Another Model'.

DATABASES
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System.InvalidCastException: Unable to cast object

QUESTIONS
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System.InvalidCastException: Unable to cast object of type 'Microsoft.ML.Data.TransformerChain`1[Microsoft.ML.ITransformer]' to type 'Microsoft.ML.Data.TransformerChain`1[Microsoft.ML.Data.RegressionPredictionTransformer`1[Microsoft.ML.Trainers.LinearRegressionModelParameters]]'.

QUESTIONS
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[Gson in Java] Use Gson to serialize object to Jso

TECHNOLOGY
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[Gson in Java] Use Gson to serialize object to Json and from Json

TECHNOLOGY
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Entity framework "InvalidCastException: Unable to

.NET 7
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Entity framework "InvalidCastException: Unable to cast object of type 'System.Int32' to type 'System.Decimal."

.NET 7
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[Solved] System.InvalidOperationException: 'Unable

QUESTIONS
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[Solved] System.InvalidOperationException: 'Unable to track an entity of type 'EntityName' because its primary key property 'Id' is null

QUESTIONS
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NullReferenceException: Object reference not set t

TECHNOLOGY
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NullReferenceException: Object reference not set to an instance of an object

TECHNOLOGY
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SiteKiosk Object Reference not set to an instance

TECHNOLOGY
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SiteKiosk Object Reference not set to an instance of an object

TECHNOLOGY
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[Solved] cannot apply indexing with [] to an expre

TECHNOLOGY
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[Solved] cannot apply indexing with [] to an expression of type QueryString

TECHNOLOGY
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What is New in C-Sharp 9 ( Developing Notes )

C-SHARP
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What is New in C-Sharp 9 ( Developing Notes )

C-SHARP
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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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Entity Framework Core Error: Unable to track an en

ENTITY FRAMEWORK
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Entity Framework Core Error: Unable to track an entity of type "Model Class Object" because primary key property 'id' is null

ENTITY FRAMEWORK
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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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Retraining Machine Learning Model in Microsoft Mac

MACHINE LEARNING
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Retraining Machine Learning Model in Microsoft Machine Learning (ML.Net) Error

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

DATABASES
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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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Unable to start Kestrel. Internal.Cryptograp

QUESTIONS
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Unable to start Kestrel. Internal.Cryptography.CryptoThrowHelper+WindowsCryptographicException: Cannot find the requested object. at Internal.Cryptography.Pal.CertificatePal.FromBlobOrFile(ReadOnlySpan`1 rawData, String fileName, SafePasswordHandle password, X509KeyStorageFlags keyStorageFlags)

QUESTIONS
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How to send JSON data in HTTP Request Body to a do

DATABASES
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How to send JSON data in HTTP Request Body to a dot net core Web API using Postman

DATABASES
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InvalidOperationException: Incorrect Content-Type

MVC
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InvalidOperationException: Incorrect Content-Type

MVC
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Microsoft.CSharp.RuntimeBinder.RuntimeBinderExcept

.NET 7
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Microsoft.CSharp.RuntimeBinder.RuntimeBinderException: 'The call is ambiguous between the following methods or properties'

.NET 7
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[SOLVED!! Entity Framework Error Asp.Net Core 3.1]

.NET 7
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[SOLVED!! Entity Framework Error Asp.Net Core 3.1] InvalidCastException: Unable to cast object of type 'Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryable`

.NET 7
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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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I cant update Nuget Package in Visual Studio 2022

TECHNOLOGY
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I cant update Nuget Package in Visual Studio 2022 (System.NullReferenceException: Object reference not set to an instance of an object at NuGet.PackageManagement.UI.UIActionEngine)

TECHNOLOGY
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ArgumentException: String cannot be of zero length

.NET 7
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ArgumentException: String cannot be of zero length. (Parameter 'oldValue')

.NET 7
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Web API 415: Unsupported Media Type

TUTORIALS
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Web API 415: Unsupported Media Type

TUTORIALS
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Error 0xc0202009: Data Flow Task 1: SSIS Error Cod

SERVERS
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Error 0xc0202009: Data Flow Task 1: SSIS Error Code DTS_E_OLEDBERROR. An OLE DB error has occurred. Error code: 0x80004005

SERVERS
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Visual Studio "Cannot detach from one or more proc

TOOLS
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Visual Studio "Cannot detach from one or more process" Object is in a zombie state. Do you want to terminate them instead

TOOLS
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Unhandled exception. System.DllNotFoundException:

NETWORK
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Unhandled exception. System.DllNotFoundException: Unable to load shared library 'MklImports' or one of its dependencies. In order to help diagnose loading problems, consider setting the LD_DEBUG environment variable: libMklImports: cannot open shared object file: No such file or directory

NETWORK
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C-Sharp 11 Tips and Tricks

RESEARCH
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C-Sharp 11 Tips and Tricks

RESEARCH
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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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MVC Form Error "Incorrect Content-Type"

HTML5
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MVC Form Error "Incorrect Content-Type"

HTML5
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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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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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How to Bind a CheckBox data to a Model Integer Pro

DATABASES
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How to Bind a CheckBox data to a Model Integer Property in DotNet Core 2.2

DATABASES
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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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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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What is New in C-Sharp 9 Programming Language

.NET 7
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What is New in C-Sharp 9 Programming Language

.NET 7
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Asp.Net Core 3.1 Error The 'inject' directive exp

.NET 7
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Asp.Net Core 3.1 Error The 'inject' directive expects an identifier

.NET 7
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ls: error while loading shared libraries: libpcre2

DOCKER-COMPOSE
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ls: error while loading shared libraries: libpcre2-8.so.0: cannot open shared object file: No such file or directory

DOCKER-COMPOSE
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SQL 0x80004005 Description: "Cannot continue the

SQL
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SQL 0x80004005 Description: "Cannot continue the execution because the session is in the kill state"

SQL
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Error The instance of entity type ModalType cannot

.NET 7
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Error The instance of entity type ModalType cannot be tracked because another instance with the key value {id: 7656544} is already being tracked.

.NET 7
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Parse xml From WebService To Json (Important)

NETWORK
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Parse xml From WebService To Json (Important)

NETWORK
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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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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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Design Parterns in C-Sharp

C-SHARP
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Design Parterns in C-Sharp

C-SHARP
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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.'

QUESTIONS
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How to Use Spans in C-Sharp ( Stackalloc, Heap and

.NET 7
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How to Use Spans in C-Sharp ( Stackalloc, Heap and Stack Memory)

.NET 7
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cannot serialize an object of type 'System.Collections.Generic.List`1

InvalidOperationException: The 'Microsoft.AspNetCo

InvalidOperationException: The 'Microsoft.AspNetCore.Mvc.ViewFeatures.Infrastructure.DefaultTempDataSerializer' cannot serialize an object of type 'System.Collections.Generic.List`1

InvalidOperationException: The 'Microsoft.AspNetCo

InvalidOperationException: The 'Microsoft.AspNetCore.Mvc.ViewFeatures.Infrastructure.DefaultTempDataSerializer' cannot serialize an object of type 'System.Collections.Generic.List`1

The 'Microsoft.AspNetCore.Mvc.ViewFeature.Infrastr

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

RuntimeBinderException: Cannot implicitly convert

RuntimeBinderException: Cannot implicitly convert type

InvalidOperationException: The model item passed i

InvalidOperationException: The model item passed into the ViewDataDictionary is of type 'System.Collections.Generic.List`1', but this ViewDataDictionary instance requires a model item of type 'Another Model'.

System.InvalidCastException: Unable to cast object

System.InvalidCastException: Unable to cast object of type 'Microsoft.ML.Data.TransformerChain`1[Microsoft.ML.ITransformer]' to type 'Microsoft.ML.Data.TransformerChain`1[Microsoft.ML.Data.RegressionPredictionTransformer`1[Microsoft.ML.Trainers.LinearRegressionModelParameters]]'.

[Gson in Java] Use Gson to serialize object to Jso

[Gson in Java] Use Gson to serialize object to Json and from Json

Entity framework "InvalidCastException: Unable to

Entity framework "InvalidCastException: Unable to cast object of type 'System.Int32' to type 'System.Decimal."

[Solved] System.InvalidOperationException: 'Unable

[Solved] System.InvalidOperationException: 'Unable to track an entity of type 'EntityName' because its primary key property 'Id' is null

NullReferenceException: Object reference not set t

NullReferenceException: Object reference not set to an instance of an object

SiteKiosk Object Reference not set to an instance

SiteKiosk Object Reference not set to an instance of an object

[Solved] cannot apply indexing with [] to an expre

[Solved] cannot apply indexing with [] to an expression of type QueryString

What is New in C-Sharp 9 ( Developing Notes )

What is New in C-Sharp 9 ( Developing Notes )

_context.ChangeTracker 'threw an exception of type

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

Entity Framework Core Error: Unable to track an en

Entity Framework Core Error: Unable to track an entity of type "Model Class Object" because primary key property 'id' is null

How to Solve XUnit Automated Testing Error: Castle

How to Solve XUnit Automated Testing Error: Castle DynamicProxy InvalidProxyConstructorArgumentsException

Retraining Machine Learning Model in Microsoft Mac

Retraining Machine Learning Model in Microsoft Machine Learning (ML.Net) Error

InvalidOperationException: The required column 'Ca

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

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

Unable to start Kestrel. Internal.Cryptograp

Unable to start Kestrel. Internal.Cryptography.CryptoThrowHelper+WindowsCryptographicException: Cannot find the requested object. at Internal.Cryptography.Pal.CertificatePal.FromBlobOrFile(ReadOnlySpan`1 rawData, String fileName, SafePasswordHandle password, X509KeyStorageFlags keyStorageFlags)

How to send JSON data in HTTP Request Body to a do

How to send JSON data in HTTP Request Body to a dot net core Web API using Postman

InvalidOperationException: Incorrect Content-Type

InvalidOperationException: Incorrect Content-Type

Microsoft.CSharp.RuntimeBinder.RuntimeBinderExcept

Microsoft.CSharp.RuntimeBinder.RuntimeBinderException: 'The call is ambiguous between the following methods or properties'

[SOLVED!! Entity Framework Error Asp.Net Core 3.1]

[SOLVED!! Entity Framework Error Asp.Net Core 3.1] InvalidCastException: Unable to cast object of type 'Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryable`

SqlNullValueException: Data is Null. This method o

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

I cant update Nuget Package in Visual Studio 2022

I cant update Nuget Package in Visual Studio 2022 (System.NullReferenceException: Object reference not set to an instance of an object at NuGet.PackageManagement.UI.UIActionEngine)

ArgumentException: String cannot be of zero length

ArgumentException: String cannot be of zero length. (Parameter 'oldValue')

Web API 415: Unsupported Media Type

Web API 415: Unsupported Media Type

Error 0xc0202009: Data Flow Task 1: SSIS Error Cod

Error 0xc0202009: Data Flow Task 1: SSIS Error Code DTS_E_OLEDBERROR. An OLE DB error has occurred. Error code: 0x80004005

Visual Studio "Cannot detach from one or more proc

Visual Studio "Cannot detach from one or more process" Object is in a zombie state. Do you want to terminate them instead

Unhandled exception. System.DllNotFoundException:

Unhandled exception. System.DllNotFoundException: Unable to load shared library 'MklImports' or one of its dependencies. In order to help diagnose loading problems, consider setting the LD_DEBUG environment variable: libMklImports: cannot open shared object file: No such file or directory

C-Sharp 11 Tips and Tricks

C-Sharp 11 Tips and Tricks

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

MVC Form Error "Incorrect Content-Type"

MVC Form Error "Incorrect Content-Type"

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

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

How to Bind a CheckBox data to a Model Integer Pro

How to Bind a CheckBox data to a Model Integer Property in DotNet Core 2.2

_context.SaveChanges is not working

_context.SaveChanges is not working

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)

What is New in C-Sharp 9 Programming Language