diff --git a/SabreTools.IO.Test/ReadersWriters/ClrMameProTests.cs b/SabreTools.IO.Test/ReadersWriters/ClrMameProTests.cs
new file mode 100644
index 0000000..a5bed63
--- /dev/null
+++ b/SabreTools.IO.Test/ReadersWriters/ClrMameProTests.cs
@@ -0,0 +1,60 @@
+using System.IO;
+using System.Text;
+using SabreTools.IO.Readers;
+using SabreTools.IO.Writers;
+using Xunit;
+
+namespace SabreTools.IO.Test.ReadersWriters
+{
+    public class ClrMameProTests
+    {
+        [Fact]
+        public void EndToEndTest()
+        {
+            string expected = "header (\n\tstandalone \"value\"\n)\n\n# Comment\n\ngame (\n\titem ( attr \"value\" )\n)";
+
+            // Build and write the CMP file
+            var stream = new MemoryStream();
+            var writer = new ClrMameProWriter(stream, Encoding.UTF8);
+            Assert.True(writer.Quotes);
+
+            writer.WriteStartElement("header");
+            writer.WriteRequiredStandalone("standalone", "value");
+            writer.WriteOptionalStandalone("optstand", null);
+            writer.WriteFullEndElement();
+
+            writer.WriteString("\n\n# Comment\n");
+
+            writer.WriteStartElement("game");
+            writer.WriteStartElement("item");
+            writer.WriteRequiredAttributeString("attr", "value");
+            writer.WriteOptionalAttributeString("optional", null);
+            writer.WriteEndElement();
+            writer.WriteFullEndElement();
+
+            writer.Flush();
+            writer.Dispose();
+
+            // Length includes UTF-8 BOM
+            Assert.Equal(77, stream.Length);
+            string actual = Encoding.UTF8.GetString(stream.ToArray(), 3, (int)stream.Length - 3);
+            Assert.Equal(expected, actual);
+
+            // Parse the CMP file
+            stream.Seek(0, SeekOrigin.Begin);
+            var reader = new ClrMameProReader(stream, Encoding.UTF8);
+            Assert.False(reader.DosCenter);
+            Assert.True(reader.Quotes);
+
+            while (!reader.EndOfStream)
+            {
+                bool hasNext = reader.ReadNextLine();
+                Assert.True(hasNext);
+                Assert.NotNull(reader.CurrentLine);
+                Assert.True(reader.LineNumber >= 0);
+            }
+
+            reader.Dispose();
+        }
+    }
+}
\ No newline at end of file
diff --git a/SabreTools.IO/Writers/ClrMameProWriter.cs b/SabreTools.IO/Writers/ClrMameProWriter.cs
index cd5a9c3..73e3f0b 100644
--- a/SabreTools.IO/Writers/ClrMameProWriter.cs
+++ b/SabreTools.IO/Writers/ClrMameProWriter.cs
@@ -118,7 +118,11 @@ namespace SabreTools.IO.Writers
         /// </summary>
         public ClrMameProWriter(Stream stream, Encoding encoding)
         {
+#if NET20 || NET35 || NET40
             sw = new StreamWriter(stream, encoding);
+#else
+            sw = new StreamWriter(stream, encoding, 1024, leaveOpen: true);
+#endif
             Quotes = true;
 
             // Element stack
@@ -167,42 +171,6 @@ namespace SabreTools.IO.Writers
             InternalWriteEndElement(true);
         }
 
-        /// <summary>
-        /// Write a complete element with content
-        /// </summary>
-        public void WriteElementString(string name, string? value)
-        {
-            WriteStartElement(name);
-            WriteString(value);
-            WriteEndElement();
-        }
-
-        /// <summary>
-        /// Ensure writing writing null values as empty strings
-        /// </summary>
-        /// <param name="name">Name of the element</param>
-        /// <param name="value">Value to write in the element</param>
-        /// <param name="throwOnError">Indicates if an error should be thrown on a missing required value</param>
-        public void WriteRequiredElementString(string name, string? value, bool throwOnError = false)
-        {
-            // Throw an exception if we are configured to
-            if (value == null && throwOnError)
-                throw new ArgumentNullException(nameof(value));
-
-            WriteElementString(name, value ?? string.Empty);
-        }
-
-        /// <summary>
-        /// Write an element, if the value is not null or empty
-        /// </summary>
-        /// <param name="name">Name of the element</param>
-        /// <param name="value">Value to write in the element</param>
-        public void WriteOptionalElementString(string name, string? value)
-        {
-            if (!string.IsNullOrEmpty(value))
-                WriteElementString(name, value);
-        }
-
         /// <summary>
         /// Write the start of an attribute node
         /// </summary>