automigration.cs

public void InitializeDatabase(YourDbContext context)
{
    if (!context.Database.Exists() || !context.Database.CompatibleWithModel(false))
    {
        var configuration = new DbMigrationsConfiguration();
        var migrator = new DbMigrator(configuration);
        migrator.Configuration.TargetDatabase = new DbConnectionInfo(context.Database.Connection.ConnectionString, "System.Data.SqlClient");
        var migrations = migrator.GetPendingMigrations();
        if (migrations.Any())
        {
            var scriptor = new MigratorScriptingDecorator(migrator);
            var script = scriptor.ScriptUpdate(null, migrations.Last());

            if (!string.IsNullOrEmpty(script))
            {
                context.Database.ExecuteSqlCommand(script);
            }
        }
    }
}

        public void InitializeDatabase(DbContext context)
        {
            if (!context.Database.Exists() || !context.Database.CompatibleWithModel(false))
            {
                var configuration = new DbMigrationsConfiguration();
                configuration.AutomaticMigrationsEnabled = true;
                configuration.AutomaticMigrationDataLossAllowed = true;

                var type = context.GetType();
                configuration.ContextKey = type.FullName;
                configuration.ContextType = type;
                configuration.MigrationsAssembly = type.Assembly;
                var migrator = new DbMigrator(configuration, context);
                var f = DbProviderFactories.GetFactory(context.Database.Connection);
                var n = f.GetType().AssemblyQualifiedName;
                var tbs = DbProviderFactories.GetFactoryClasses();
                var invariant = "";

                foreach (DataRow row in tbs.Rows)
                {
                    if ((string)row["AssemblyQualifiedName"] != n) continue;
                    invariant = (string)row["InvariantName"];
                    break;
                }
                migrator.Configuration.TargetDatabase =  new DbConnectionInfo(context.Database.Connection.ConnectionString, invariant);
                migrator.Update();
            }
        }

Automatically migrate your database if you need to