Windows 10: getting error System.IO.FileLoadException: Could not load file or assembly 'System.Runtime,...

I have VS 2017 ver 15.9.24 installed and trying to run migration in .NET core project. Target version is .NET core 2.1. I also have latest version of .NET core SDK 2.1.807 x64 installed in my machine.

I am getting following error.


PM> add-migration testMigration
System.IO.FileLoadException: Could not load file or assembly 'System.Runtime, Version=4.2.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The located assembly's manifest definition does not match the assembly reference. Exception from HRESULT: 0x80131040
File name: 'System.Runtime, Version=4.2.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
at System.ModuleHandle.ResolveMethodRuntimeModule module, Int32 methodToken, IntPtr* typeInstArgs, Int32 typeInstCount, IntPtr* methodInstArgs, Int32 methodInstCount
at System.ModuleHandle.ResolveMethodHandleInternalCoreRuntimeModule module, Int32 methodToken, IntPtr[] typeInstantiationContext, Int32 typeInstCount, IntPtr[] methodInstantiationContext, Int32 methodInstCount
at System.ModuleHandle.ResolveMethodHandleInternalRuntimeModule module, Int32 methodToken, RuntimeTypeHandle[] typeInstantiationContext, RuntimeTypeHandle[] methodInstantiationContext
at System.Reflection.CustomAttribute.FilterCustomAttributeRecordCustomAttributeRecord caRecord, MetadataImport scope, Assembly& lastAptcaOkAssembly, RuntimeModule decoratedModule, MetadataToken decoratedToken, RuntimeType attributeFilterType, Boolean mustBeInheritable, Object[] attributes, IList derivedAttributes, RuntimeType& attributeType, IRuntimeMethodInfo& ctor, Boolean& ctorHasParameters, Boolean& isVarArg
at System.Reflection.CustomAttribute.GetCustomAttributesRuntimeModule decoratedModule, Int32 decoratedMetadataToken, Int32 pcaCount, RuntimeType attributeFilterType, Boolean mustBeInheritable, IList derivedAttributes, Boolean isDecoratedTargetSecurityTransparent
at System.Reflection.CustomAttribute.GetCustomAttributesRuntimeType type, RuntimeType caType, Boolean inherit
at System.Attribute.GetCustomAttributesMemberInfo element, Type type, Boolean inherit
at System.Attribute.GetCustomAttributeMemberInfo element, Type attributeType, Boolean inherit
at System.Reflection.CustomAttributeExtensions.GetCustomAttribute[T]MemberInfo element
at Microsoft.EntityFrameworkCore.Design.Internal.DbContextOperations.<>c.<FindContextTypes>b__12_5TypeInfo t
at System.Linq.Enumerable.WhereSelectListIterator`2.MoveNext
at System.Linq.Enumerable.WhereEnumerableIterator`1.MoveNext
at System.Linq.Enumerable.ConcatIterator`1.MoveNext
at System.Linq.Enumerable.DistinctIterator`1.MoveNext
at System.Linq.Enumerable.WhereEnumerableIterator`1.MoveNext
at Microsoft.EntityFrameworkCore.Design.Internal.DbContextOperations.FindContextTypes
at Microsoft.EntityFrameworkCore.Design.Internal.DbContextOperations.FindContextTypeString name
at Microsoft.EntityFrameworkCore.Design.Internal.DbContextOperations.CreateContextString contextType
at Microsoft.EntityFrameworkCore.Design.Internal.MigrationsOperations.AddMigrationString name, String outputDir, String contextType
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.AddMigrationImplString name, String outputDir, String contextType
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.<>c__DisplayClass3_0`1.<Execute>b__0
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.ExecuteAction action


Could not load file or assembly 'System.Runtime, Version=4.2.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The located assembly's manifest definition does not match the assembly reference. Exception from HRESULT: 0x80131040
PM>

:)

 

error message: Can not load file assembly MOM.Implementation or one of its the system cannot find file specified

When we sign on we are getting an error message - Can not load file assembly MOM.Implementation or one of its

the system cannot find file specified

 

Runtime Error of File Explorer .

Hello,

The Runtime Error that you received might have occurred due to some software conflicts or corrupted Windows system files. To help you out with your concern, we suggest running the
System File Checker tool to repair missing or corrupted system files on your
computer.

If the issue persists, we advise that you follow the troubleshooting steps provided by
Deepika Gowda found on this thread
about resolving Runtime Error in Windows 10.

Let us know the outcome and if you need further help.

 

Error Loading operating system

I'm getting the BIOS System Configuration screen and at the very end

searching for Boot Record from IDE-0..OK
Error Loading operating system

What can I do to make it boot?