transaction.cs

// Transaction 내부에 있는 데이터베이스 작업들은 Atomic합니다!
await using (var transaction = await _dbContext.Database.BeginTransactionAsync()) 
{
   var entity = await _dbContext.AnalysisModels.FindAsync(id);
   entity.Field = "test"; // Update
   await _dbContext.SaveChangesAsync();
   await transaction.CommitAsync(); // Finish Transaction
}