Silverlight application changes ignored when deploying them

https://stackoverflow.com/a/57458713/1219280

Visual Studio throwing error in trying to debug Silverlight project

Saying something in the lines "visual studio unable to start debugging ***silverlight***" ?

Try uninstallng your installed silverlight runtime components, and reinstalling their 32 bit version.
And set your windows default browser to Internet Explorer.

Silverlight 32 bit download
Silverlight 32 bit Developer Runtime download

Silverlight NumericUpDown and BusyIndicator dlls missing

If you are facing the messages

The type or namespace name 'NumericUpDown' could not be found (are you missing a using directive or an assembly reference?)

or

The type or namespace name 'BusyIndicator' could not be found (are you missing a using directive or an assembly reference?)

You are likely missing the installation of Silverlight's toolkit. Install the one that matches the silverlight version you are using.

Unable to debug Silverlight Application

I was unable to successfully debug my silverlight application until I came across the this answer from StackOverflow (worth checking the one above it as well, although it was the 2nd that fixed my issue).

Fixing error Silverlight.Csharp.Targets was not found

If you are facing build errors where some (likely projects that rely on Silverlight) of your projects are not being loaded into the solution, here's what worked for me (I used Visual Studio 2015, but the same should work for 2010):

(The solution is based on what was proposed here).

1. Go do Programs and Features, select your Visual Studio installation, and run a Modify (if not present, you may be forced to go with Repair). Check the checkbox that mentions Silverlight
2. Afterwards, when reopening Visual Studio to see if the project(s) is/are correctly loaded - you will be prompted to install Silverlight Developer - the pop-up will include the download link as well. Download, install, and you are (hopefully) done.