Bonjour,

Je travaille avec visual studio 2012 avec l'entity Framework et la base de données c'est microsoft sql serveur 2014 lors de l'enregistrement de mon fiché j'ai rencontre cette erreur....

Une exception a été levée par l'initialiseur de type pour 'System.Data.Entity.Internal.AppConfig'.

et page AppConfig

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
    <section name="MySQL" type="MySql.Data.MySqlClient.MySqlConfiguration, MySql.Data, Version=6.9.12.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
    <section name="oracle.manageddataaccess.client" type="OracleInternal.Common.ODPMSectionHandler, Oracle.ManagedDataAccess, Version=4.122.19.1, Culture=neutral, PublicKeyToken=89b483f429c47342" />
  </configSections>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
  </startup>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
      <parameters>
        <parameter value="mssqllocaldb" />
      </parameters>
    </defaultConnectionFactory>
    <providers>
      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
      <provider invariantName="Oracle.ManagedDataAccess.Client" type="Oracle.ManagedDataAccess.EntityFramework.EFOracleProviderServices, Oracle.ManagedDataAccess.EntityFramework, Version=6.122.19.1, Culture=neutral, PublicKeyToken=89b483f429c47342" />
      <provider invariantName="MySql.Data.MySqlClient" type="MySql.Data.MySqlClient.MySqlProviderServices, MySql.Data.EntityFramework, Version=8.0.16.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d"></provider>
    </providers>
  </entityFramework>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="MySql.Data" publicKeyToken="c5687fc88969c44d" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-8.0.16.0" newVersion="8.0.16.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Google.Protobuf" publicKeyToken="a7d26565bac4d604" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-3.9.0.0" newVersion="3.9.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="BouncyCastle.Crypto" publicKeyToken="0e99375e54769942" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-1.8.5.0" newVersion="1.8.5.0" />
      </dependentAssembly>
      <dependentAssembly>
        <publisherPolicy apply="no" />
        <assemblyIdentity name="Oracle.ManagedDataAccess" publicKeyToken="89b483f429c47342" culture="neutral" />
        <bindingRedirect oldVersion="4.121.0.0 - 4.65535.65535.65535" newVersion="4.122.19.1" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
  <MySQL>
    <Replication>
      <ServerGroups>
        <Group name="Fabric" groupType="MySql.Fabric.FabricServerGroup, MySql.Fabric.Plugin">
          <Servers>
            <Server name="fabric" connectionstring="server=;port=32275;uid=;password=;" />
          </Servers>
        </Group>
      </ServerGroups>
    </Replication>
  </MySQL>
  <system.data>
    <DbProviderFactories>
      <remove invariant="Oracle.ManagedDataAccess.Client" />
      <add name="ODP.NET, Managed Driver" invariant="Oracle.ManagedDataAccess.Client" description="Oracle Data Provider for .NET, Managed Driver" type="Oracle.ManagedDataAccess.Client.OracleClientFactory, Oracle.ManagedDataAccess, Version=4.122.19.1, Culture=neutral, PublicKeyToken=89b483f429c47342" />
    </DbProviderFactories>
  </system.data>
  <oracle.manageddataaccess.client>
    <version number="*">
      <dataSources>
        <dataSource alias="SampleDataSource" descriptor="(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=ORCL))) " />
      </dataSources>
    </version>
  </oracle.manageddataaccess.client>
  <connectionStrings>
    <add name="OracleDbContext" providerName="Oracle.ManagedDataAccess.Client" connectionString="User Id=oracle_user;Password=oracle_user_password;Data Source=oracle" />
    <add name="DbStockContext" connectionString="metadata=res://*/DbStock.csdl|res://*/DbStock.ssdl|res://*/DbStock.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=DESKTOP-F1HOKVA\SQLSERVER;initial catalog=DbStock;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework&quot;" providerName="System.Data.EntityClient" />
    <add name="dbStockContext" connectionString="metadata=res://*/DbStock.csdl|res://*/DbStock.ssdl|res://*/DbStock.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=DESKTOP-F1HOKVA\SQLSERVER;initial catalog=GESTION_DE_STOCK;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework&quot;" providerName="System.Data.EntityClient" />
    <add name="GESTION_DE_STOCKContext" connectionString="metadata=res://*/DbStock.csdl|res://*/DbStock.ssdl|res://*/DbStock.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=DESKTOP-F1HOKVA\SQLSERVER;initial catalog=GESTION_DE_STOCK;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework&quot;" providerName="System.Data.EntityClient" />
    <add name="GESTION_DE_STOCKEntities" connectionString="metadata=res://*/DbStock.csdl|res://*/DbStock.ssdl|res://*/DbStock.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=DESKTOP-F1HOKVA\SQLSERVER;initial catalog=GESTION_DE_STOCK;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework&quot;" providerName="System.Data.EntityClient" />
  </connectionStrings>
</configuration>

et merci d'avance...