diff --git a/CHANGELOG.md b/CHANGELOG.md
index 36b231e56..57c5804d0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -70,6 +70,7 @@ Update dependencies:
 ### Features
 
 1. [#590](https://github.com/influxdata/influxdb-client-csharp/pull/590): Allows disable Trace verbose messages
+2. [#606](https://github.com/influxdata/influxdb-client-csharp/pull/606): Use IEnumerable in WriteApi to eliminate unnescessary memmory allocations
 
 ### Dependencies
 Update dependencies:
diff --git a/Client/WriteApi.cs b/Client/WriteApi.cs
index bff60a8e1..bbfe6f212 100644
--- a/Client/WriteApi.cs
+++ b/Client/WriteApi.cs
@@ -42,7 +42,7 @@ void WriteRecord(string record, WritePrecision precision = WritePrecision.Ns, st
         /// <param name="precision">specifies the precision for the unix timestamps within the body line-protocol; default Nanoseconds</param>
         /// <param name="bucket">specifies the destination bucket for writes. If the bucket is not specified then is used config from <see cref="InfluxDBClientOptions.Bucket" />.</param>
         /// <param name="org">specifies the destination organization for writes. If the org is not specified then is used config from <see cref="InfluxDBClientOptions.Org" />.</param>
-        void WriteRecords(List<string> records, WritePrecision precision = WritePrecision.Ns,
+        void WriteRecords(IEnumerable<string> records, WritePrecision precision = WritePrecision.Ns,
             string bucket = null, string org = null);
 
         /// <summary>
@@ -69,7 +69,7 @@ void WriteRecords(string[] records, WritePrecision precision = WritePrecision.Ns
         /// <param name="points">specifies the Data points to write into bucket</param>
         /// <param name="bucket">specifies the destination bucket for writes. If the bucket is not specified then is used config from <see cref="InfluxDBClientOptions.Bucket" />.</param>
         /// <param name="org">specifies the destination organization for writes. If the org is not specified then is used config from <see cref="InfluxDBClientOptions.Org" />.</param>
-        void WritePoints(List<PointData> points, string bucket = null, string org = null);
+        void WritePoints(IEnumerable<PointData> points, string bucket = null, string org = null);
 
         /// <summary>
         /// Write Data points into specified bucket.
@@ -98,7 +98,7 @@ void WriteMeasurement<TM>(TM measurement, WritePrecision precision = WritePrecis
         /// <param name="bucket">specifies the destination bucket for writes. If the bucket is not specified then is used config from <see cref="InfluxDBClientOptions.Bucket" />.</param>
         /// <param name="org">specifies the destination organization for writes. If the org is not specified then is used config from <see cref="InfluxDBClientOptions.Org" />.</param>
         /// <typeparam name="TM">measurement type</typeparam>
-        void WriteMeasurements<TM>(List<TM> measurements, WritePrecision precision = WritePrecision.Ns,
+        void WriteMeasurements<TM>(IEnumerable<TM> measurements, WritePrecision precision = WritePrecision.Ns,
             string bucket = null, string org = null);
 
         /// <summary>
@@ -388,10 +388,10 @@ public void WriteRecord(string record, WritePrecision precision = WritePrecision
         /// <param name="precision">specifies the precision for the unix timestamps within the body line-protocol; default Nanoseconds</param>
         /// <param name="bucket">specifies the destination bucket for writes. If the bucket is not specified then is used config from <see cref="InfluxDBClientOptions.Bucket" />.</param>
         /// <param name="org">specifies the destination organization for writes. If the org is not specified then is used config from <see cref="InfluxDBClientOptions.Org" />.</param>
-        public void WriteRecords(List<string> records, WritePrecision precision = WritePrecision.Ns,
+        public void WriteRecords(IEnumerable<string> records, WritePrecision precision = WritePrecision.Ns,
             string bucket = null, string org = null)
         {
-            records.ForEach(record => WriteRecord(record, precision, bucket, org));
+            foreach (var record in records) WriteRecord(record, precision, bucket, org);
         }
 
         /// <summary>
@@ -430,7 +430,7 @@ public void WritePoint(PointData point, string bucket = null, string org = null)
         /// <param name="points">specifies the Data points to write into bucket</param>
         /// <param name="bucket">specifies the destination bucket for writes. If the bucket is not specified then is used config from <see cref="InfluxDBClientOptions.Bucket" />.</param>
         /// <param name="org">specifies the destination organization for writes. If the org is not specified then is used config from <see cref="InfluxDBClientOptions.Org" />.</param>
-        public void WritePoints(List<PointData> points, string bucket = null, string org = null)
+        public void WritePoints(IEnumerable<PointData> points, string bucket = null, string org = null)
         {
             foreach (var point in points) WritePoint(point, bucket, org);
         }
@@ -443,7 +443,7 @@ public void WritePoints(List<PointData> points, string bucket = null, string org
         /// <param name="org">specifies the destination organization for writes. If the org is not specified then is used config from <see cref="InfluxDBClientOptions.Org" />.</param>
         public void WritePoints(PointData[] points, string bucket = null, string org = null)
         {
-            WritePoints(points.ToList(), bucket, org);
+            WritePoints(points.AsEnumerable(), bucket, org);
         }
 
         /// <summary>
@@ -475,7 +475,7 @@ public void WriteMeasurement<TM>(TM measurement, WritePrecision precision = Writ
         /// <param name="bucket">specifies the destination bucket for writes. If the bucket is not specified then is used config from <see cref="InfluxDBClientOptions.Bucket" />.</param>
         /// <param name="org">specifies the destination organization for writes. If the org is not specified then is used config from <see cref="InfluxDBClientOptions.Org" />.</param>
         /// <typeparam name="TM">measurement type</typeparam>
-        public void WriteMeasurements<TM>(List<TM> measurements, WritePrecision precision = WritePrecision.Ns,
+        public void WriteMeasurements<TM>(IEnumerable<TM> measurements, WritePrecision precision = WritePrecision.Ns,
             string bucket = null, string org = null)
         {
             foreach (var measurement in measurements) WriteMeasurement(measurement, precision, bucket, org);
@@ -492,7 +492,7 @@ public void WriteMeasurements<TM>(List<TM> measurements, WritePrecision precisio
         public void WriteMeasurements<TM>(TM[] measurements, WritePrecision precision = WritePrecision.Ns,
             string bucket = null, string org = null)
         {
-            WriteMeasurements(measurements.ToList(), precision, bucket, org);
+            WriteMeasurements(measurements.AsEnumerable(), precision, bucket, org);
         }
 
         /// <summary>
diff --git a/Client/WriteApiAsync.cs b/Client/WriteApiAsync.cs
index bd926637b..ad7859fa2 100644
--- a/Client/WriteApiAsync.cs
+++ b/Client/WriteApiAsync.cs
@@ -34,7 +34,7 @@ Task WriteRecordAsync(string record, WritePrecision precision = WritePrecision.N
         /// <param name="bucket">specifies the destination bucket for writes. If the bucket is not specified then is used config from <see cref="InfluxDBClientOptions.Bucket" />.</param>
         /// <param name="org">specifies the destination organization for writes. If the org is not specified then is used config from <see cref="InfluxDBClientOptions.Org" />.</param>
         /// <param name="cancellationToken">specifies the token to monitor for cancellation requests</param>
-        Task WriteRecordsAsync(List<string> records, WritePrecision precision = WritePrecision.Ns,
+        Task WriteRecordsAsync(IEnumerable<string> records, WritePrecision precision = WritePrecision.Ns,
             string bucket = null, string org = null, CancellationToken cancellationToken = default);
 
         /// <summary>
@@ -78,7 +78,7 @@ Task WritePointAsync(PointData point, string bucket = null, string org = null,
         /// <param name="bucket">specifies the destination bucket for writes. If the bucket is not specified then is used config from <see cref="InfluxDBClientOptions.Bucket" />.</param>
         /// <param name="org">specifies the destination organization for writes. If the org is not specified then is used config from <see cref="InfluxDBClientOptions.Org" />.</param>
         /// <param name="cancellationToken">specifies the token to monitor for cancellation requests</param>
-        Task WritePointsAsync(List<PointData> points, string bucket = null, string org = null,
+        Task WritePointsAsync(IEnumerable<PointData> points, string bucket = null, string org = null,
             CancellationToken cancellationToken = default);
 
         /// <summary>
@@ -124,7 +124,7 @@ Task WriteMeasurementAsync<TM>(TM measurement, WritePrecision precision = WriteP
         /// <param name="org">specifies the destination organization for writes. If the org is not specified then is used config from <see cref="InfluxDBClientOptions.Org" />.</param>
         /// <param name="cancellationToken">specifies the token to monitor for cancellation requests</param>
         /// <typeparam name="TM">measurement type</typeparam>
-        Task WriteMeasurementsAsync<TM>(List<TM> measurements, WritePrecision precision = WritePrecision.Ns,
+        Task WriteMeasurementsAsync<TM>(IEnumerable<TM> measurements, WritePrecision precision = WritePrecision.Ns,
             string bucket = null, string org = null, CancellationToken cancellationToken = default);
 
         /// <summary>
@@ -200,11 +200,11 @@ public Task WriteRecordAsync(string record, WritePrecision precision = WritePrec
         /// <param name="bucket">specifies the destination bucket for writes. If the bucket is not specified then is used config from <see cref="InfluxDBClientOptions.Bucket" />.</param>
         /// <param name="org">specifies the destination organization for writes. If the org is not specified then is used config from <see cref="InfluxDBClientOptions.Org" />.</param>
         /// <param name="cancellationToken">specifies the token to monitor for cancellation requests</param>
-        public Task WriteRecordsAsync(List<string> records, WritePrecision precision = WritePrecision.Ns,
+        public Task WriteRecordsAsync(IEnumerable<string> records, WritePrecision precision = WritePrecision.Ns,
             string bucket = null, string org = null, CancellationToken cancellationToken = default)
         {
             var options = new BatchWriteOptions(bucket ?? _options.Bucket, org ?? _options.Org, precision);
-            var list = records.Select(record => new BatchWriteRecord(options, record)).ToList();
+            var list = records.Select(record => new BatchWriteRecord(options, record));
 
             return WriteData(options.OrganizationId, options.Bucket, precision, list, cancellationToken);
         }
@@ -220,7 +220,7 @@ public Task WriteRecordsAsync(List<string> records, WritePrecision precision = W
         public Task WriteRecordsAsync(string[] records, WritePrecision precision = WritePrecision.Ns,
             string bucket = null, string org = null, CancellationToken cancellationToken = default)
         {
-            return WriteRecordsAsync(records.ToList(), precision, bucket, org, cancellationToken);
+            return WriteRecordsAsync(records.AsEnumerable(), precision, bucket, org, cancellationToken);
         }
 
         /// <summary>
@@ -269,15 +269,14 @@ public Task WritePointAsync(PointData point, string bucket = null, string org =
         /// <param name="bucket">specifies the destination bucket for writes. If the bucket is not specified then is used config from <see cref="InfluxDBClientOptions.Bucket" />.</param>
         /// <param name="org">specifies the destination organization for writes. If the org is not specified then is used config from <see cref="InfluxDBClientOptions.Org" />.</param>
         /// <param name="cancellationToken">specifies the token to monitor for cancellation requests</param>
-        public async Task WritePointsAsync(List<PointData> points, string bucket = null, string org = null,
+        public async Task WritePointsAsync(IEnumerable<PointData> points, string bucket = null, string org = null,
             CancellationToken cancellationToken = default)
         {
             foreach (var grouped in points.GroupBy(it => it.Precision))
             {
                 var options = new BatchWriteOptions(bucket ?? _options.Bucket, org ?? _options.Org, grouped.Key);
                 var groupedPoints = grouped
-                    .Select(it => new BatchWritePoint(options, _options, it))
-                    .ToList();
+                    .Select(it => new BatchWritePoint(options, _options, it));
 
                 await WriteData(options.OrganizationId, options.Bucket, grouped.Key, groupedPoints, cancellationToken)
                     .ConfigureAwait(false);
@@ -294,7 +293,7 @@ await WriteData(options.OrganizationId, options.Bucket, grouped.Key, groupedPoin
         public Task WritePointsAsync(PointData[] points, string bucket = null, string org = null,
             CancellationToken cancellationToken = default)
         {
-            return WritePointsAsync(points.ToList(), bucket, org, cancellationToken);
+            return WritePointsAsync(points.AsEnumerable(), bucket, org, cancellationToken);
         }
 
         /// <summary>
@@ -353,8 +352,9 @@ public Task WriteMeasurementAsync<TM>(TM measurement, WritePrecision precision =
         /// <param name="org">specifies the destination organization for writes. If the org is not specified then is used config from <see cref="InfluxDBClientOptions.Org" />.</param>
         /// <param name="cancellationToken">specifies the token to monitor for cancellation requests</param>
         /// <typeparam name="TM">measurement type</typeparam>
-        public Task WriteMeasurementsAsync<TM>(List<TM> measurements, WritePrecision precision = WritePrecision.Ns,
-            string bucket = null, string org = null, CancellationToken cancellationToken = default)
+        public Task WriteMeasurementsAsync<TM>(IEnumerable<TM> measurements,
+            WritePrecision precision = WritePrecision.Ns, string bucket = null, string org = null,
+            CancellationToken cancellationToken = default)
         {
             var list = new List<BatchWriteData>();
 
@@ -380,7 +380,7 @@ public Task WriteMeasurementsAsync<TM>(List<TM> measurements, WritePrecision pre
         public Task WriteMeasurementsAsync<TM>(TM[] measurements, WritePrecision precision = WritePrecision.Ns,
             string bucket = null, string org = null, CancellationToken cancellationToken = default)
         {
-            return WriteMeasurementsAsync(measurements.ToList(), precision, bucket, org, cancellationToken);
+            return WriteMeasurementsAsync(measurements.AsEnumerable(), precision, bucket, org, cancellationToken);
         }
 
         /// <summary>
@@ -404,7 +404,6 @@ public Task<RestResponse> WriteMeasurementsAsyncWithIRestResponse<TM>(IEnumerabl
             return WriteDataAsyncWithIRestResponse(batch, bucket, org, precision, cancellationToken);
         }
 
-
         private Task WriteData(string org, string bucket, WritePrecision precision, IEnumerable<BatchWriteData> data,
             CancellationToken cancellationToken)
         {