Delete all data from DB except the dbo._MigrationHistory table using Entity Framework.

clearDbExceptEfMigrationHistory.cs

using(var context = new PlayContext())
{
    context.Database.ExecuteSqlCommand(@"
        EXEC sp_MSForEachTable 'ALTER TABLE ? NOCHECK CONSTRAINT ALL';
        EXEC sp_MSForEachTable 'IF OBJECT_ID(''?'') NOT IN (OBJECT_ID(''[dbo].[__MigrationHistory]'')) DELETE FROM ?';
        EXEC sp_MSForEachTable 'ALTER TABLE ? WITH CHECK CHECK CONSTRAINT ALL';
    ");
}