diff --git a/src/TensorFlowNET.Core/APIs/tf.io.cs b/src/TensorFlowNET.Core/APIs/tf.io.cs
index 6d1f7d17..40da04b1 100644
--- a/src/TensorFlowNET.Core/APIs/tf.io.cs
+++ b/src/TensorFlowNET.Core/APIs/tf.io.cs
@@ -23,6 +23,7 @@ namespace Tensorflow
     {
         public GFile gfile = new GFile();
         public Tensor read_file(string filename, string name = null) => gen_io_ops.read_file(filename, name);
+        public Tensor read_file(Tensor filename, string name = null) => gen_io_ops.read_file(filename, name);
 
         public ITensorOrOperation[] import_graph_def(GraphDef graph_def,
             Dictionary<string, Tensor> input_map = null,
diff --git a/src/TensorFlowNET.Core/GraphTransformation/GraphTransformer.cs b/src/TensorFlowNET.Core/GraphTransformation/GraphTransformer.cs
index 5bc74351..381ff744 100644
--- a/src/TensorFlowNET.Core/GraphTransformation/GraphTransformer.cs
+++ b/src/TensorFlowNET.Core/GraphTransformation/GraphTransformer.cs
@@ -1,6 +1,8 @@
 using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Text;
+using Google.Protobuf;
 
 namespace Tensorflow
 {
@@ -15,17 +17,30 @@ namespace Tensorflow
         /// <param name="outputs">the model outputs</param>
         /// <param name="transforms">transform names and parameters</param>
         /// <returns></returns>
-        public GraphDef TransformGraph(GraphDef input_graph_def, 
-            string[] inputs, 
-            string[] outputs, 
+        public GraphDef TransformGraph(GraphDef input_graph_def,
+            string[] inputs,
+            string[] outputs,
             string[] transforms)
         {
-            var input_graph_def_string = input_graph_def.ToString();
+            var input_graph_def_string = input_graph_def.ToByteArray();
             var inputs_string = string.Join(",", inputs);
             var outputs_string = string.Join(",", outputs);
-            var transforms_string = string.Join(",", transforms);
+            var transforms_string = string.Join(" ", transforms);
+            using (var status = new Status())
+            {
+                var buffer = new Buffer();
+                var len = c_api.TransformGraphWithStringInputs(input_graph_def_string,
+                    input_graph_def_string.Length,
+                    inputs_string,
+                    outputs_string,
+                    transforms_string,
+                    buffer,
+                    status);
 
-            throw new NotImplementedException("");
+                status.Check(false);
+                var bytes = buffer.ToArray();
+                return GraphDef.Parser.ParseFrom(bytes);
+            }
         }
     }
 }
diff --git a/src/TensorFlowNET.Core/GraphTransformation/c_api.transform_graph.cs b/src/TensorFlowNET.Core/GraphTransformation/c_api.transform_graph.cs
new file mode 100644
index 00000000..8390d74e
--- /dev/null
+++ b/src/TensorFlowNET.Core/GraphTransformation/c_api.transform_graph.cs
@@ -0,0 +1,33 @@
+/*****************************************************************************
+   Copyright 2018 The TensorFlow.NET Authors. All Rights Reserved.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+******************************************************************************/
+
+using System;
+using System.Runtime.InteropServices;
+
+namespace Tensorflow
+{
+    public partial class c_api
+    {
+        [DllImport(TensorFlowLibName)]
+        public static extern int TransformGraphWithStringInputs(byte[] graph_def_string,
+                                      int graph_def_string_len,
+                                      string inputs_string,
+                                      string outputs_string,
+                                      string transforms_string,
+                                      IntPtr output_buffer,
+                                      IntPtr status);
+    }
+}
diff --git a/src/TensorFlowNET.Core/Operations/gen_io_ops.cs b/src/TensorFlowNET.Core/Operations/gen_io_ops.cs
index 2a921d93..13408452 100644
--- a/src/TensorFlowNET.Core/Operations/gen_io_ops.cs
+++ b/src/TensorFlowNET.Core/Operations/gen_io_ops.cs
@@ -34,7 +34,7 @@ namespace Tensorflow
             return _op.outputs;
         }
 
-        public static Tensor read_file(string filename, string name = null)
+        public static Tensor read_file<T>(T filename, string name = null)
         {
             var _op = _op_def_lib._apply_op_helper("ReadFile", name: name, args: new { filename });
 
diff --git a/src/TensorFlowNET.Core/TensorFlow.Binding.csproj b/src/TensorFlowNET.Core/TensorFlow.Binding.csproj
index cd5a5c90..ea93f37d 100644
--- a/src/TensorFlowNET.Core/TensorFlow.Binding.csproj
+++ b/src/TensorFlowNET.Core/TensorFlow.Binding.csproj
@@ -5,7 +5,7 @@
     <AssemblyName>TensorFlow.NET</AssemblyName>
     <RootNamespace>Tensorflow</RootNamespace>
     <TargetTensorFlow>1.14.1</TargetTensorFlow>
-    <Version>0.14.0</Version>
+    <Version>0.15.0</Version>
     <Authors>Haiping Chen, Meinrad Recheis, Eli Belash</Authors>
     <Company>SciSharp STACK</Company>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
@@ -18,15 +18,11 @@
     <Description>Google's TensorFlow full binding in .NET Standard.
 Building, training and infering deep learning models.
 https://tensorflownet.readthedocs.io</Description>
-    <AssemblyVersion>0.14.0.0</AssemblyVersion>
-    <PackageReleaseNotes>Changes since v0.13.0:
-1: Upgrade NumSharp to v0.20.5
-2: Return byte[] for TF_String
-3: Fix return_tensors for import_graph_def
-4: Add tf.nn.ctc_greedy_decoder
-5: Fix calling RegisterGradientFunction too early</PackageReleaseNotes>
+    <AssemblyVersion>0.15.0.0</AssemblyVersion>
+    <PackageReleaseNotes>Changes since v0.14.0:
+1: Add TransformGraphWithStringInputs.</PackageReleaseNotes>
     <LangVersion>7.3</LangVersion>
-    <FileVersion>0.14.0.0</FileVersion>
+    <FileVersion>0.15.0.0</FileVersion>
     <PackageLicenseFile>LICENSE</PackageLicenseFile>
     <PackageRequireLicenseAcceptance>true</PackageRequireLicenseAcceptance>
     <SignAssembly>true</SignAssembly>