Error after executing Enable-Migration(The type initializer for 'System.Data.Entity.Internal.AppConfig' threw an exception.)

Entity Framework
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PM> Enable-Migrations
A version of Entity Framework older than 6.3 is also installed. The newer tools are running. Use ‘EntityFramework\Enable-Migrations’ for the older version.
Checking if the context targets an existing database…
System.TypeInitializationException: The type initializer for ‘System.Data.Entity.Internal.AppConfig’ threw an exception. —> System.Configuration.ConfigurationErrorsException: Configuration system failed to initialize —> System.Configuration.ConfigurationErrorsException: Unrecognized configuration section connectionstring. (F:\coding\EntityFramework\CodeFirstApproch\CodeFirst\App.config line 16)
at System.Configuration.ConfigurationSchemaErrors.ThrowIfErrors(Boolean ignoreLocal)
at System.Configuration.BaseConfigurationRecord.ThrowIfParseErrors(ConfigurationSchemaErrors schemaErrors)
at System.Configuration.ClientConfigurationSystem.EnsureInit(String configKey)
— End of inner exception stack trace —
at System.Configuration.ClientConfigurationSystem.EnsureInit(String configKey)
at System.Configuration.ClientConfigurationSystem.PrepareClientConfigSystem(String sectionName)
at System.Configuration.ClientConfigurationSystem.System.Configuration.Internal.IInternalConfigSystem.GetSection(String sectionName)
at System.Configuration.ConfigurationManager.GetSection(String sectionName)
at System.Configuration.ConfigurationManager.get_ConnectionStrings()
at System.Data.Entity.Internal.AppConfig…ctor()
at System.Data.Entity.Internal.AppConfig…cctor()
— End of inner exception stack trace —
at System.Data.Entity.Infrastructure.DependencyResolution.DbConfigurationManager.EnsureLoadedForAssembly(Assembly assemblyHint, Type contextTypeHint)
at System.Data.Entity.Infrastructu

App_config
App_config1911×822 20.7 KB

re.Design.Executor.ScaffoldInitialCreateInternal(DbConnectionInfo connectionInfo, String contextTypeName, String contextAssemblyName, String migrationsNamespace, Boolean auto, String migrationsDir)
at System.Data.Entity.Infrastructure.Design.Executor.ScaffoldInitialCreate.<>c__DisplayClass0_0.<.ctor>b__0()
at System.Data.Entity.Infrastructure.Design.Executor.OperationBase.<>c__DisplayClass4_0`1.b__0()
at System.Data.Entity.Infrastructure.Design.Executor.OperationBase.Execute(Action action)

The type initializer for ‘System.Data.Entity.Internal.AppConfig’ threw an exception.

2

Check your configuration for proper syntax.