Unable to start debugging. The Silverlight Developer Runtime is not installed.
Learn how to solve this error: Unable to start debugging. The Silverlight Developer Runtime is not installed. Please install a matching version.
My development laptop physically damaged recently and I had to switch over to another temporary laptop. It took about a day for me to install all dev software including Visual Studio 2010, SQL Server 2008 and many other software. After all the installations are done, I created a test project using Visual Studio and confirmed everything is alright. Then I went to my work place and I tried debugging my project. To my surprise, it came with the following message:
---------------------------
Microsoft Visual Studio
---------------------------
Unable to start debugging. The Silverlight Developer Runtime is not installed. Please install a matching version.
---------------------------
I thought I had setup everything and wasn't sure what is the role of Silverlight in debugging my ASP.NET project, which doesn't use any Silverlight components. Moreover, I already had Silverlight installed. But the problem was, my version of Silverlight was 5.0 but my Visual Studio version was expecting Silverlight 4.0. All I had to to solve the error was, install Silverlight Developer Runtime.
You can download Silverlight Developer Runtime and install on your computer to resolve this error.Installation error: A newer version of Silverlight is already installed.
When I tried to install Silverlight, I received the following error:
Unable to install Silverlight.
A newer version of Silverlight is already installed.
This was because my computer had Silverlight 5.0 installed when I tried to install Silverlight 4.0.
All I had to do was, go to the "Add Remove Programs" and uninstall the Silverlight from there. After installing the newer version, I was able to install the Silverlight 4.0 and resolve the debugging error in Visual Studio.
I was also getting the same error even after installing the latest error. I was resolved by the following steps.
In "Properties" of your project In "Web" menu under "Debugging" option please un check the check box "silverlight" oriented. Now save all and I hope that it will work fine.