BudgetAnalyser.Engine.Services.ApplicationDatabaseService.SaveAsync C# (CSharp) Метод

        public async Task SaveAsync()
        {
            if (this.budgetAnalyserDatabase == null)
            {
                throw new InvalidOperationException("Application Database cannot be null here. Code Bug.");
            }

            if (!HasUnsavedChanges)
            {
                return;
            }

            var messages = new StringBuilder();
            if (!ValidateAll(messages))
            {
                throw new ValidationWarningException(messages.ToString());
            }

            this.databaseDependents
                .Where(service => this.dirtyData[service.DataType])
                .ToList()
                .ForEach(service => service.SavePreview());

            // This clears all the temporary tasks from the collection.  Only tasks that have CanDelete=false will be kept and saved.
            this.budgetAnalyserDatabase.LedgerReconciliationToDoCollection.Clear();

            // Save the main application repository first.
            await this.applicationRepository.SaveAsync(this.budgetAnalyserDatabase);

            // Save all remaining service's data in parallel.
            await this.databaseDependents
                .Where(service => this.dirtyData[service.DataType])
                .Select(async service => await Task.Run(async () => await service.SaveAsync(this.budgetAnalyserDatabase)))
                .ContinueWhenAllTasksComplete();

            ClearDirtyDataFlags();
            this.monitorableDependencies.NotifyOfDependencyChange<IApplicationDatabaseService>(this);
        }