Consulta EF a Oracle arrojando ORA-12704:falta de coincidencia del conjunto de caracteres

Terminé haciendo que el autor de esto (ODP.Net Managed Driver - ORA-12704:juego de caracteres no coinciden en el código generado) actualice la pregunta, publicó una solución usando un interceptor, daré un poco más de detalles aquí. .

Primero, decoré mi DBContext para cargar una configuración. puede omitir esto y simplemente agregarlo a su configuración si tiene una:

[DbConfigurationType(typeof(MyDbConfiguration))]
public partial class MyContext : DbContext

Crea la clase de configuración:

public class MyDbConfiguration : DbConfiguration
{
    public MyDbConfiguration()
    {
        this.AddInterceptor(new NVarcharInterceptor()); //add this line to existing config.
    }
}

A continuación, cree el interceptor:

public class NVarcharInterceptor : IDbCommandInterceptor
{
    public void NonQueryExecuted(DbCommand command, DbCommandInterceptionContext<int> interceptionContext)
    {
        if (command != null && !string.IsNullOrWhiteSpace(command.CommandText))
            command.CommandText = command.CommandText.Replace("N''", "''");
    }

    public void NonQueryExecuting(DbCommand command, DbCommandInterceptionContext<int> interceptionContext)
    {
        if (command != null && !string.IsNullOrWhiteSpace(command.CommandText))
            command.CommandText = command.CommandText.Replace("N''", "''");
    }

    public void ReaderExecuted(DbCommand command, DbCommandInterceptionContext<DbDataReader> interceptionContext)
    {
        if (command != null && !string.IsNullOrWhiteSpace(command.CommandText))
            command.CommandText = command.CommandText.Replace("N''", "''");
    }

    public void ReaderExecuting(DbCommand command, DbCommandInterceptionContext<DbDataReader> interceptionContext)
    {
        if (command != null && !string.IsNullOrWhiteSpace(command.CommandText))
            command.CommandText = command.CommandText.Replace("N''", "''");
    }

    public void ScalarExecuted(DbCommand command, DbCommandInterceptionContext<object> interceptionContext)
    {
        if (command != null && !string.IsNullOrWhiteSpace(command.CommandText))
            command.CommandText = command.CommandText.Replace("N''", "''");
    }

    public void ScalarExecuting(DbCommand command, DbCommandInterceptionContext<object> interceptionContext)
    {
        if (command != null && !string.IsNullOrWhiteSpace(command.CommandText))
            command.CommandText = command.CommandText.Replace("N''", "''");
    }
}