Solved Solutions to computer programming Errors

_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 "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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System.TypeInitializationException: The type initi

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

LUNUX
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An unhandled exception occurred while processing t

.NET 7
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An unhandled exception occurred while processing the request: FormatException: The header contains invalid values at index 0

.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: 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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[Solved] System.InvalidOperationException: 'Unable

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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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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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StreamJsonRpc.RemoteInvocationException: Cannot fi

QUESTIONS
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StreamJsonRpc.RemoteInvocationException: Cannot find the old value Parameter name: oldValue

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

ENTITY FRAMEWORK
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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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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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Software Development Refactoring Wisdom I gained t

SOFTWARE DEVELOPMENT
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Software Development Refactoring Wisdom I gained through Reviewing My Own Code

SOFTWARE DEVELOPMENT
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iis just in time debugging error

SERVERS
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iis just in time debugging error

SERVERS
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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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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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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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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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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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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: An exception was thrown

ENTITY FRAMEWORK
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InvalidOperationException: An exception was thrown while attempting to evaluate the LINQ query parameter expression

ENTITY FRAMEWORK
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[Solved] Machine-Learning Error: The expected type

MACHINE-LEARNING
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[Solved] Machine-Learning Error: The expected type was 'System.Single' but the actual value was of type 'System.Decimal

MACHINE-LEARNING
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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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How to Call a Soap Web Service from Asp.Net Core

.NET 7
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How to Call a Soap Web Service from Asp.Net Core

.NET 7
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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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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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An unhandled exception has occurred while executin

.NET 7
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An unhandled exception has occurred while executing the request. System.ArgumentNullException: Value cannot be null. (Parameter 'buffer')

.NET 7
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Asp.Net Core Error: InvalidOperationException: The

.NET 7
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Asp.Net Core Error: InvalidOperationException: The model item passed into the ViewDataDictionary is of type '<>f__AnonymousType7`2[System.Int32,System.String]', but this ViewDataDictionary instance requires a model item of type 'Modal'.

.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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[Solved] Asp.Net Core C-Sharp Error: IOException:

.NET 7
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[Solved] Asp.Net Core C-Sharp Error: IOException: The process cannot access file because it is being used by another process

.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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How to Optimize Web Server for Faster Response Tim

TECHNOLOGY
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How to Optimize Web Server for Faster Response Time

TECHNOLOGY
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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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ASP.Net Core 2.2 MVC Error g.cshtml.cs: The type o

HTML5
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ASP.Net Core 2.2 MVC Error g.cshtml.cs: The type or namespace name ErrorViewModel could not be found (are you missing a using directive or an assembly reference). File Error.g.cshtml.cs

HTML5
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InvalidOperationException: There is no ViewData it

.NET 7
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InvalidOperationException: There is no ViewData item of type 'IEnumerable<SelectListItem>' that has the key 'Department'

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

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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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No matching IPassiveHealthCheckPolicy found for th

QUESTIONS
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No matching IPassiveHealthCheckPolicy found for the passive health check policy name 'TransportFailureRateHealthPolicy'

QUESTIONS
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System.IO.FileNotFoundException: Could not load fi

.NET 7
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System.IO.FileNotFoundException: Could not load file or assembly 'System.Runtime.CompilerServices.Unsafe, Version=6.0.0.0, Culture=neutral

.NET 7
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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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Unhandled exception. System.InvalidOperationExcept

.NET 7
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Unhandled exception. System.InvalidOperationException: This platform doesn't support QUIC or HTTP3

.NET 7
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System.InvalidOperationException: The ConnectionSt

ENTITY FRAMEWORK
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System.InvalidOperationException: The ConnectionString property has not been initialized [EF Core 7, Asp.Net 7]

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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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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Application startup exception: System.InvalidOpera

MVC
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Application startup exception: System.InvalidOperationException: Cannot resolve scoped service from root provider

MVC
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The configured execution strategy 'SlqServerRetryi

.NET 7
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The configured execution strategy 'SlqServerRetryingExecutionStrategy' does not support user-initiated transactions. Use the execution strategy returned by DbContext.Database.CreateExecutionStrategy()' to execute

.NET 7
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Asp.Net Programming Bad Practices

ALGORITHMS
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Asp.Net Programming Bad Practices

ALGORITHMS
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[Entity Framework Core 5] An Unhandled Exception O

ENTITY FRAMEWORK
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[Entity Framework Core 5] An Unhandled Exception Occurred While Processing the Request

ENTITY FRAMEWORK
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An Exception was thrown while attempting to evalua

.NET 7
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An Exception was thrown while attempting to evaluate the LINQ query parameter expression

.NET 7
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exception of type 'System.ObjectDisposedException

_context.ChangeTracker 'threw an exception of type

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

Entity framework "InvalidCastException: Unable to

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

System.TypeInitializationException: The type initi

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

An unhandled exception occurred while processing t

An unhandled exception occurred while processing the request: FormatException: The header contains invalid values at index 0

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: The 'Microsoft.AspNetCo

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

[Solved] System.InvalidOperationException: 'Unable

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

AspNet MVC ViewData Error: InvalidOperationExcepti

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

StreamJsonRpc.RemoteInvocationException: Cannot fi

StreamJsonRpc.RemoteInvocationException: Cannot find the old value Parameter name: oldValue

InvalidOperationException: Incorrect Content-Type

InvalidOperationException: Incorrect Content-Type

Asp.Net 5 Application is losing state when enters

Asp.Net 5 Application is losing state when enters an Event Handler C-Sharp

SqlNullValueException: Data is Null. This method o

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

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.

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

Software Development Refactoring Wisdom I gained t

Software Development Refactoring Wisdom I gained through Reviewing My Own Code

iis just in time debugging error

iis just in time debugging error

NullReferenceException: Object reference not set t

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

Microsoft.CSharp.RuntimeBinder.RuntimeBinderExcept

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

equivalent of bit data type in C#

equivalent of bit data type in C#

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)

Can't bind the IDataView column ColumnName of type

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

The 'Microsoft.AspNetCore.Mvc.ViewFeature.Infrastr

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

InvalidOperationException: An exception was thrown

InvalidOperationException: An exception was thrown while attempting to evaluate the LINQ query parameter expression

[Solved] Machine-Learning Error: The expected type

[Solved] Machine-Learning Error: The expected type was 'System.Single' but the actual value was of type 'System.Decimal

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]]'.

How to Call a Soap Web Service from Asp.Net Core

How to Call a Soap Web Service from Asp.Net Core

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

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

InvalidOperationException: The 'Microsoft.AspNetCo

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

An unhandled exception has occurred while executin

An unhandled exception has occurred while executing the request. System.ArgumentNullException: Value cannot be null. (Parameter 'buffer')

Asp.Net Core Error: InvalidOperationException: The

Asp.Net Core Error: InvalidOperationException: The model item passed into the ViewDataDictionary is of type '<>f__AnonymousType7`2[System.Int32,System.String]', but this ViewDataDictionary instance requires a model item of type 'Modal'.

RuntimeBinderException: 'System.Dynamic.DynamicObj

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

[Solved] Asp.Net Core C-Sharp Error: IOException:

[Solved] Asp.Net Core C-Sharp Error: IOException: The process cannot access file because it is being used by another process

Sql Server Error: Unable to modify table. The co

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

How to Optimize Web Server for Faster Response Tim

How to Optimize Web Server for Faster Response Time

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

[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

ASP.Net Core 2.2 MVC Error g.cshtml.cs: The type o

ASP.Net Core 2.2 MVC Error g.cshtml.cs: The type or namespace name ErrorViewModel could not be found (are you missing a using directive or an assembly reference). File Error.g.cshtml.cs

InvalidOperationException: There is no ViewData it

InvalidOperationException: There is no ViewData item of type 'IEnumerable<SelectListItem>' that has the key 'Department'

[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`

No matching IPassiveHealthCheckPolicy found for th

No matching IPassiveHealthCheckPolicy found for the passive health check policy name 'TransportFailureRateHealthPolicy'

System.IO.FileNotFoundException: Could not load fi