Index: DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io/MStabDamXmlSerializer.cs
===================================================================
diff -u -r3115 -r3149
--- DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io/MStabDamXmlSerializer.cs	(.../MStabDamXmlSerializer.cs)	(revision 3115)
+++ DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io/MStabDamXmlSerializer.cs	(.../MStabDamXmlSerializer.cs)	(revision 3149)
@@ -75,7 +75,7 @@
         {
             tnsPrefixDamMStabDoc.tnsPrefixFileIdentification = CreateFileIdentification();
             XmlSerializer xmlSerializer = new XmlSerializer(typeof(tnsPrefixDamMStabDoc));
-            TextWriter writer = new StringWriter();
+            TextWriter writer = new ExtentedStringWriter(new StringBuilder(), Encoding.UTF8);
             xmlSerializer.Serialize(writer, tnsPrefixDamMStabDoc);
             string xmlString = writer.ToString();
             xmlString = PreProcessPrefixes(xmlString);
@@ -123,7 +123,7 @@
             }
             tnsPrefixDamMStabDocFileIdentification.Application = hostAssembly.GetName().Name;
             tnsPrefixDamMStabDocFileIdentification.Version = hostAssembly.GetName().Version.ToString();
-            tnsPrefixDamMStabDocFileIdentification.Created = DateTime.Now.ToShortDateString() + " "+ DateTime.Now.ToShortTimeString();
+            tnsPrefixDamMStabDocFileIdentification.Created = DateTime.Now.ToString("yyyy-MM-dd") + "T"+ DateTime.Now.ToString("HH:MM:s") + "Z";
             tnsPrefixDamMStabDocFileIdentification.Company = "Deltares";
             return tnsPrefixDamMStabDocFileIdentification;
         }
Index: DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.StiFileCreator.Tests/StiFileCreatorTests.cs
===================================================================
diff -u -r3147 -r3149
--- DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.StiFileCreator.Tests/StiFileCreatorTests.cs	(.../StiFileCreatorTests.cs)	(revision 3147)
+++ DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.StiFileCreator.Tests/StiFileCreatorTests.cs	(.../StiFileCreatorTests.cs)	(revision 3149)
@@ -55,7 +55,7 @@
 
                 // Then Exception Is Thrown
                 Throws.TypeOf<ArgumentNullException>().With.Message.EqualTo(
-                    "Value cannot be null." + Environment.NewLine + "Parameter name: StiFileCreatorInput"));
+                    "Value cannot be null." + Environment.NewLine + "Parameter name: stiFileCreatorInput"));
         }
 
         [Test]
Index: DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io/Deltares.LayerOnSlopeTool.Io.csproj
===================================================================
diff -u -r3138 -r3149
--- DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io/Deltares.LayerOnSlopeTool.Io.csproj	(.../Deltares.LayerOnSlopeTool.Io.csproj)	(revision 3138)
+++ DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io/Deltares.LayerOnSlopeTool.Io.csproj	(.../Deltares.LayerOnSlopeTool.Io.csproj)	(revision 3149)
@@ -45,6 +45,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="DamMStabDoc.cs" />
+    <Compile Include="ExtendedStringWriter.cs" />
     <Compile Include="FillIoDamMStabDocFromXml.cs" />
     <Compile Include="FillXmlDamMStabDocFromIo.cs" />
     <Compile Include="IoCalculationOptions.cs" />
Index: DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io/ExtendedStringWriter.cs
===================================================================
diff -u
--- DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io/ExtendedStringWriter.cs	(revision 0)
+++ DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.Io/ExtendedStringWriter.cs	(revision 3149)
@@ -0,0 +1,49 @@
+// Copyright (C) Stichting Deltares 2020. All rights reserved.
+//
+// This file is part of the Dam Engine.
+//
+// The Dam Engine is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System.IO;
+using System.Text;
+
+namespace Deltares.LayerOnSlopeTool.Io
+{
+    /// <summary>Extended stringwriter</summary>
+    /// <seealso cref="System.IO.StringWriter" />
+    public sealed class ExtentedStringWriter : StringWriter
+    {
+        private readonly Encoding stringWriterEncoding;
+        /// <summary>Initializes a new instance of the <see cref="ExtentedStringWriter"/> class.</summary>
+        /// <param name="builder">The builder.</param>
+        /// <param name="desiredEncoding">The desired encoding.</param>
+        public ExtentedStringWriter(StringBuilder builder, Encoding desiredEncoding)
+            : base(builder)
+        {
+            this.stringWriterEncoding = desiredEncoding;
+        }
+
+        public override Encoding Encoding
+        {
+            get
+            {
+                return this.stringWriterEncoding;
+            }
+        }
+    }
+}
\ No newline at end of file
Index: DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.StiFileCreator/StiFileCreator.cs
===================================================================
diff -u -r3147 -r3149
--- DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.StiFileCreator/StiFileCreator.cs	(.../StiFileCreator.cs)	(revision 3147)
+++ DamTools/LayerOnSlopeTool/trunk/src/Deltares.LayerOnSlopeTool.StiFileCreator/StiFileCreator.cs	(.../StiFileCreator.cs)	(revision 3149)
@@ -40,7 +40,8 @@
             IoMStabDamDoc ioMStabDamDoc = CreateMStabDamDocFromInput(stiFileCreatorInput);
             tnsPrefixDamMStabDoc xmlDamMStabDoc = FillXmlDamMStabDocFromIo.FillXmlDamMStabDoc(ioMStabDamDoc);
             string xmlString = MStabDamXmlSerializer.SaveDamMStabDocAsXmlString(xmlDamMStabDoc);
-            File.WriteAllText(stiFileCreatorInput.OutputFilename + ".xml", xmlString, Encoding.Unicode);
+            var length = xmlString.Length;
+            File.WriteAllText(stiFileCreatorInput.OutputFilename + ".xml", xmlString, Encoding.ASCII);
             int result = mStabDAMInterface.CreateProjectFile(xmlString);
             if (result != 0)
             {