First time here?

You are looking at the most recent posts. You may also want to check out older archives. Please leave a comment, ask a question and consider subscribing to the latest posts via RSS or email. Thank you for visiting!

While working on some plugins for the new Seesmic Desktop Platform I got sick of copying and pasting some boiler plate code over and over.  I had created some helper templates for myself so that I could say File…New Seesmic Desktop Plugin and get everything I needed initially.  This weekend I had some time and formalized those templates into an easy-to-use installer for anyone to consume. 

NOTE: It is likely that Seesmic themselves will create developer project/item templates…these were for my own use and I shared them on the Seesmic Desktop Platform developer forum for anyone to benefit from (or ignore).  They are not the official templates from Seesmic.

Prior to VS2010 you could create what is called a Visual Studio Community Content Installer…which is a .VSI file that installs things like snippets, etc.  And actually you can still do that today.  The process is manual and involves a few XML manifest files, zipping up the contents and renaming it to .VSI (the VSI is just a ZIP format).  It isn’t hard, but isn’t painless as well – it’s a lot of manual steps.

Enter VS2010 and the Visual Studio SDK.  First, the items I am describing below require you to have the VS2010 SDK installed.  It is NOT installed by default.  Visual Studio 2010 has a file format called VSIX which is basically a Visual Studio Extension (VSX was already taken by Visio).  This extension format is intended to be a one-stop installer format for all things extensible.  Things like add-ins, etc.  But it can also be used for simple things like Item and Project template types.  Here’s what I did.

1. Starting the project

After you have VS2010 SDK installed, choose File…New VSIX Project

VSIX Project

Note that this is under a language area (C# or Visual Basic).  This is because there is some assumption that you are creating more than just a template deployer…but just note that.  In my instance it actually didn’t matter what language area I chose.

2. Removing ‘binary’ packages

By default the VSIX project thinks you are going to be creating code extensions and will package the project’s DLL and PDB files as a part of your extension.  If you are using this process as I was for template extensions, this is not necessary.  There is an easy way of avoiding this.  Open up the csproj file (or vbproj) you just created in notepad and add these lines in the XML file:

   1: <PropertyGroup>
   2:   <CopyBuildOutputToOutputDirectory>false</CopyBuildOutputToOutputDirectory>
   3:   <CopyOutputSymbolsToOutputDirectory>false</CopyOutputSymbolsToOutputDirectory>
   4: </PropertyGroup>

This tells the compiler to not package those types of files into our extension.  I put these below my last PropertyGroup statement in the file.  Save the proj file.  If you return to Visual Studio (and had the project open while making these edits in notepad) you’ll be alerted to reload the project, go ahead and reload baby.

3. Editing the manfiest information

When you create the project it will open up with a dialog that is a visual editor to the core manifest.  This is where you will put your metadata as well as begin to add your content.  Here is a snapshot of mine:

VSIX Manifest Editor

Notice the simple metadata information (name, author, version, etc.).  This is important information that I’d highly recommend to include as you’ll see why in later steps.

Notice the Content area in the bottom.  This is where you’ll add your content.  If you have a blank project you will click the Add Content button and choose the type (in my case Project Template and Item Template) and browse to the file.  Note that this copies that file to this project…not a reference.  So if you change the file outside of this project, you’ll want to update it again.  Do this for each template type you want to deploy.

4. Understanding Path information for templates

Notice my path of my templates:

template path data

This is important because it will determine how the templates are structured in Visual Studio after the user installs them.  My path above results in this:

Installed Templates view

This enables my users to find it under Silverlight as well as the custom branch that I have specified.  This is a helpful tip to your users and provides a more professional look in my opinion.

5.  Building the VSIX file

This step is easy.  F5.  It’s the same build process as any other project type.  The result is a VSIX file.  When the user double-clicks on that (and has Visual Studio installed) they’ll see your dialog:

VSIX Install Dialog

You could optionally digitally sign your VSIX file so the ‘unidentified publisher’ statement isn’t there.

6.  Making your VSIX Discoverable

This is the fun part.  Now that you have a standard Visual Studio Extension, you can make it readily available to any Visual Studio developer.  You could simply post a link to it on your blog, have the user download the VSIX and that is acceptable.  But you can also make it available in Visual Studio’s online gallery which then becomes searchable and seamlessly installable by end users.

Visit the Visual Studio Gallery page to start the process.  Notice the Upload button in the upper right area…that is where you start.  After authenticating with Windows Live ID, it is a 3 step process:

  1. Determine what type (Tool, Control, Template)
  2. Upload the VSIX
  3. Edit and annotate further criteria

The first two steps are simple, in my case I chose Template, then uploaded my VSIX which goes through some steps of validation making sure it is a valid VSIX file.  The final step enables you to specify more data that is annotating your extension to make it more searchable.  Here was my page.

Visual Studio Gallery info page

Notice the tags I added to help it be discoverable?  Now users can – from within Visual Studio 2010 – search and install extensions immediately:

Integrated extension search in Visual Studio

Any installed extensions show up in the Extension Manager (Tools menu) for easy disabling or uninstalling).


After this quick process I have a distributed package for my community as well as now have added templates to my development environment making it easy to create new extensions for Seesmic (my sample used here):

new project templates

It was fairly simple and I love that it is integrated into Visual Studio 2010 for everyone now!

Hope this helps!

This work is licensed under a Creative Commons Attribution By license.

5/3/2010 11:39 AM | # re: Creating Visual Studio Extension Files (VSIX) for Template Deployment
This is great Tim, now I'm curious about creating the Item Templates themselves.

If you have written a blog post about it, you might link it here.
5/3/2010 1:11 PM | # re: Creating Visual Studio Extension Files (VSIX) for Template Deployment
JustinD - creating templates is easy...File...Export Template and follow the wizard.
9/15/2010 1:30 PM | # How conveeenient
"You could optionally digitally sign your VSIX file so the ‘unidentified publisher’ statement isn’t there."

That one sentence saved you hours and hours of work figuring out how the heck you do this, then describing the process of signing the assembly in your post.

Bravo. Too bad everybody else has taken the same shortcut.
11/19/2010 3:42 AM | # re: Creating Visual Studio Extension Files (VSIX) for Template Deployment
Hey Tim,
I have a problem with the VSIX. I double click the VSIX and the dialog said, the extension is installed. but when i look into the project templates, i do not see the one that is installed. I am able to see the extension in the Extension manager dialog, but not in the project template dialog. the following is what i see in my log

11/19/2010 12:56:38 PM - The extension with ID 'TestExtensions.Test.e12f4dc0-43b0-456e-bc3c-cec405646e87' is not installed to Microsoft Visual Studio 2010 Ultimate.

if i can have pointers around a possible solution it will help.

3/5/2013 7:04 AM | # re: Creating Visual Studio Extension Files (VSIX) for Template Deployment
Hi Tim,

Currently I have a problem with my VSIX. I followed all the step. But at the end after hitting F5 I am getting error like ... Part URI cannot contain fragment code.... please help me ...
8/9/2013 6:43 AM | # re: Creating Visual Studio Extension Files (VSIX) for Template Deployment
Hi, this example works with VS2010 Shell Isolated, or have an idea of how to add templates in Shell Isolated? Thank you very much. Fabiana.
10/3/2013 4:39 AM | # re: Creating Visual Studio Extension Files (VSIX) for Template Deployment
Hello Tim. Great post!
The MSDN articles on this topic are incomplete and bland. With this step by step tutorial, creating my VS Extension was a walk in the park!

Just one question... I have specified the path Csharp\Web\Custom and I can see the new installed template under the Custom category, but does not show neither under Web or C# categories. Is there something I'm doing wrong?

Please add 8 and 4 and type the answer here:


The opinions/content expressed on this blog are provided "ASIS" with no warranties and are my own personal opinions/content (unless otherwise noted) and do not represent my employer's view in any way.