Added an option to generate partial classes in the C# backend.

src/Generator/Driver.cs

@@ -181,6 +181,7 @@ namespace Cxxi
             GenerateLibraryNamespace = true;
             GenerateFunctionTemplates = false;
             WriteOnlyWhenChanged = false;
+            GeneratePartialClasses = true;
 
             var platform = Environment.OSVersion.Platform;
             Abi = (platform == PlatformID.Unix || platform == PlatformID.MacOSX) ?
@@ -196,6 +197,7 @@ namespace Cxxi
         public bool OutputInteropIncludes = true;
         public bool GenerateLibraryNamespace;
         public bool GenerateFunctionTemplates;
+        public bool GeneratePartialClasses;
         public string OutputNamespace;
         public string OutputDir;
         public string LibraryName;

src/Generator/Generators/CSharp/CSharpTextTemplate.cs

@@ -372,6 +372,9 @@ namespace Cxxi.Generators.CSharp
             if (@class.IsAbstract)
                 Write("abstract ");
 
+            if (Options.GeneratePartialClasses)
+                Write("partial ");
+
             Write(@class.IsValueType ? "struct " : "class ");
             Write("{0}", SafeIdentifier(@class.Name));