When i tried to connect to sql server configuration manager in sql server 2008. It shows error MMC could not create the snap-in.

It was working perfectly till last night. What can be the reason, how can i solve it. But in background sql server is working perfect.
This guy here had the same problem: MMC could not create the snap-in. SQL Server configuration manager error
I said there that I had the same problem and found out that it was an issue with .net framework.
I downloaded this file: "dotNetFx40_Full_x86_x64.exe" from Microsoft website, and used the "repair" option. It worked for me. Hope it helps.