Пример файлов реализации

1C.AddIn.csproj

@@ -59,6 +59,8 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="AddIn.cs" />
+    <Compile Include="Component.cs" />
+    <Compile Include="IComponent.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="RussianNameAttribute.cs" />
   </ItemGroup>

Component.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace System1C.AddIn
+{
+    /// <summary>Класс, реализующий пользовательские методы компоненты</summary>
+    [ProgId("AddIn.1C_Component")]
+    [ClassInterface(ClassInterfaceType.None)]
+    public class Component : AddIn, IComponent
+    {
+        public int Procedure(int parameter)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}

IComponent.cs

@@ -0,0 +1,13 @@
+using System.Runtime.InteropServices;
+
+namespace System1C.AddIn
+{
+    /// <summary>Èíòåðôåéñ ñ îáúÿâëåíèÿìè ïîëüçîâàòåëüñêèõ ìåòîäîâ è ñâîéñòâ êîìïîíåíòû</summary>
+    /// 
+    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
+    public interface IComponent
+    {
+        [RussianName("ÌåòîäÍàÐóññêîìßçûêå")]
+        int Procedure(int parameter);
+    }
+}