Extracted initial ICodedOutputStream interface

src/ProtocolBuffers/ICodedOutputStream.cs

+using System;
+using Google.ProtocolBuffers.Descriptors;
+
+namespace Google.ProtocolBuffers
+{
+    public interface ICodedOutputStream
+    {
+        /// <summary>
+        /// Writes a double field value, including tag, to the stream.
+        /// </summary>
+        void WriteDouble(int fieldNumber, string fieldName, double value);
+
+        /// <summary>
+        /// Writes a float field value, including tag, to the stream.
+        /// </summary>
+        void WriteFloat(int fieldNumber, string fieldName, float value);
+
+        /// <summary>
+        /// Writes a uint64 field value, including tag, to the stream.
+        /// </summary>
+        [CLSCompliant(false)]
+        void WriteUInt64(int fieldNumber, string fieldName, ulong value);
+
+        /// <summary>
+        /// Writes an int64 field value, including tag, to the stream.
+        /// </summary>
+        void WriteInt64(int fieldNumber, string fieldName, long value);
+
+        /// <summary>
+        /// Writes an int32 field value, including tag, to the stream.
+        /// </summary>
+        void WriteInt32(int fieldNumber, string fieldName, int value);
+
+        /// <summary>
+        /// Writes a fixed64 field value, including tag, to the stream.
+        /// </summary>
+        [CLSCompliant(false)]
+        void WriteFixed64(int fieldNumber, string fieldName, ulong value);
+
+        /// <summary>
+        /// Writes a fixed32 field value, including tag, to the stream.
+        /// </summary>
+        [CLSCompliant(false)]
+        void WriteFixed32(int fieldNumber, string fieldName, uint value);
+
+        /// <summary>
+        /// Writes a bool field value, including tag, to the stream.
+        /// </summary>
+        void WriteBool(int fieldNumber, string fieldName, bool value);
+
+        /// <summary>
+        /// Writes a string field value, including tag, to the stream.
+        /// </summary>
+        void WriteString(int fieldNumber, string fieldName, string value);
+
+        /// <summary>
+        /// Writes a group field value, including tag, to the stream.
+        /// </summary>
+        void WriteGroup(int fieldNumber, string fieldName, IMessageLite value);
+
+        [Obsolete]
+        void WriteUnknownGroup(int fieldNumber, string fieldName, IMessageLite value);
+
+        void WriteMessage(int fieldNumber, string fieldName, IMessageLite value);
+        void WriteBytes(int fieldNumber, string fieldName, ByteString value);
+
+        [CLSCompliant(false)]
+        void WriteUInt32(int fieldNumber, string fieldName, uint value);
+
+        void WriteEnum(int fieldNumber, string fieldName, int value, string textValue);
+        void WriteSFixed32(int fieldNumber, string fieldName, int value);
+        void WriteSFixed64(int fieldNumber, string fieldName, long value);
+        void WriteSInt32(int fieldNumber, string fieldName, int value);
+        void WriteSInt64(int fieldNumber, string fieldName, long value);
+        void WriteMessageSetExtension(int fieldNumber, string fieldName, IMessageLite value);
+        void WriteMessageArray(int fieldNumber, string fieldName, System.Collections.IEnumerable list);
+        void WriteGroupArray(int fieldNumber, string fieldName, System.Collections.IEnumerable list);
+        void WriteArray(FieldType fieldType, int fieldNumber, string fieldName, System.Collections.IEnumerable list);
+        void WritePackedArray(FieldType fieldType, int fieldNumber, string fieldName, System.Collections.IEnumerable list);
+        void WritePackedArray(FieldType fieldType, int fieldNumber, string fieldName, int calculatedSize, System.Collections.IEnumerable list);
+        void WriteField(FieldType fieldType, int fieldNumber, string fieldName, object value);
+        void Flush();
+    }
+}
\ No newline at end of file

src/ProtocolBuffers/ProtocolBuffers.csproj

@@ -103,6 +103,7 @@
     <Compile Include="Collections\Enumerables.cs" />
     <Compile Include="Collections\IPopsicleList.cs" />
     <Compile Include="Collections\PopsicleList.cs" />
+    <Compile Include="CodedOutputStream.ComputeSize.cs" />
     <Compile Include="Delegates.cs" />
     <Compile Include="CodedInputStream.cs" />
     <Compile Include="CodedOutputStream.cs" />
@@ -163,6 +164,7 @@
     <Compile Include="IBuilderLite.cs">
       <SubType>Code</SubType>
     </Compile>
+    <Compile Include="ICodedOutputStream.cs" />
     <Compile Include="IMessage.cs" />
     <Compile Include="IMessageLite.cs" />
     <Compile Include="InvalidProtocolBufferException.cs" />