Update All fields of a document in MongoDB using BuildWrite

UpdateBulk.cs

		public async Task<long> UpdateBulk<T>(IMongoCollection<T> _collection, IEnumerable<T> items, FilterDefinition<T> filter, params string[] propertiesToSkip)
		{
			if (!items.Any())
			{ 				
				return 0;
			}

			var updates = new List<WriteModel<T>>();
			var filterBuilder = Builders<T>.Filter;
			var updater = Builders<T>.Update;
			var requests = new List<UpdateOneModel<T>>();
			var updateValues = new List<UpdateDefinition<T>>();
			foreach (var doc in items)
			{
				foreach (PropertyInfo prop in typeof(Case).GetProperties())
				{
					if (prop.Name == "Id" || propertiesToSkip.Contains(prop.Name, StringComparer.InvariantCultureIgnoreCase)) continue;

					//Create field update definition
					updateValues.Add(updater.Set(prop.Name, prop.GetValue(doc)));
				}

				// Convert all field udpates definitions to single model update request
				var request = new UpdateOneModel<T>(filter, updater.Combine(updateValues));
				request.IsUpsert = true;
				requests.Add(request);
			}

			updates.AddRange(requests);
			BulkWriteResult result = await _collection.BulkWriteAsync(updates);
			long updatedCount = result.ModifiedCount;

			Log.Info("Updated {updatedCount} documents.", updatedCount);
			return updatedCount;
		}