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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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 'Microsoft.AspNetCo

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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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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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_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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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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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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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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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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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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InvalidOperationException: The model item passed i

DATABASES
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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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InvalidOperationException: Incorrect Content-Type

MVC
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InvalidOperationException: Incorrect Content-Type

MVC
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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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RuntimeBinderException: Cannot implicitly convert

.NET 7
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RuntimeBinderException: Cannot implicitly convert type

.NET 7
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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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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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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 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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Web API 415: Unsupported Media Type

TUTORIALS
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Web API 415: Unsupported Media Type

TUTORIALS
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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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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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Parse xml From WebService To Json (Important)

NETWORK
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Parse xml From WebService To Json (Important)

NETWORK
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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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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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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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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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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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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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Asp.Net MVC Development Notes

.NET 7
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Asp.Net MVC Development Notes

.NET 7
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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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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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Sql Server Error: Unable to modify table. The co

SQL
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Sql Server Error: Unable to modify table. The conversion of a date data type to a datetime data type resulted in an out-of-range value. The statement has been terminated

SQL
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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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equivalent of bit data type in C#

.NET 7
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equivalent of bit data type in C#

.NET 7
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Can't bind the IDataView column ColumnName of type

DATABASES
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Can't bind the IDataView column ColumnName of type VectorSingle, 2 to field or property AnotherColumnName of type System.Single

DATABASES
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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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C-Sharp 11 Tips and Tricks

RESEARCH
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C-Sharp 11 Tips and Tricks

RESEARCH
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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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[Solved] Entity Framework Core Asp.Net Core 3.1 Er

SQL
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[Solved] Entity Framework Core Asp.Net Core 3.1 Error: SqlException: The conversion of a datetime2 data type to a datetime data type resulted in an out-of-range value. The statement has been terminated

SQL
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cannot serialize an object of type

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'

InvalidOperationException: The 'Microsoft.AspNetCo

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

[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

_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

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

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

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

Microsoft.CSharp.RuntimeBinder.RuntimeBinderExcept

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

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]]'.

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')

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'.

InvalidOperationException: Incorrect Content-Type

InvalidOperationException: Incorrect Content-Type

[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`

RuntimeBinderException: Cannot implicitly convert

RuntimeBinderException: Cannot implicitly convert type

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

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

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 Solve XUnit Automated Testing Error: Castle

How to Solve XUnit Automated Testing Error: Castle DynamicProxy InvalidProxyConstructorArgumentsException

Web API 415: Unsupported Media Type

Web API 415: Unsupported Media Type

What is New in C-Sharp 9 Programming Language

What is New in C-Sharp 9 Programming Language

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

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

ls: error while loading shared libraries: libpcre2

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

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)

Parse xml From WebService To Json (Important)

Parse xml From WebService To Json (Important)

AspNet MVC ViewData Error: InvalidOperationExcepti

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

Design Parterns in C-Sharp

Design Parterns in C-Sharp

Retraining Machine Learning Model in Microsoft Mac

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

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

WPF Error: System.InvalidOperationException 'The c

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

SqlNullValueException: Data is Null. This method o

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

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

Asp.Net MVC Development Notes