ModelDocExtension conflict

[codestackdev]

The following compile error is displayed when ModelDocExtension class is used explicitly:

error CS0433: The type 'ModelDocExtension' exists in both 'CodeStack.SwEx.AddIn, Version=0.8.1.0, Culture=neutral, PublicKeyToken=a46023996d4724e7' and 'SolidWorks.Interop.sldworks, Version=27.1.0.72, Culture=neutral, PublicKeyToken=7c4797c3e4eeac03'

ModelDocExtension modelDocExt2 = model.Extension;
var appPageSetup4 = modelDocExt2.AppPageSetup;

This only happens if variable of type ModelDocExtension is declared explicitly.

The are several workarounds available:

1. Use IModelDocExtension instead of ModelDocExtension

IModelDocExtension modelDocExt1 = model.Extension;
var appPageSetup3 = modelDocExt1.AppPageSetup;

2. Use var in C# to avoid explicit declaration

var modelDocExt = model.Extension;
var appPageSetup2 = modelDocExt.AppPageSetup;

3. Do not declare the variable, but use Extension property of IModelDoc2

var appPageSetup1 = model.Extension.AppPageSetup;