Strong signing a third party assembly in .net.?

Assigning a strong name to a third party DLL using your visual studio command prompt.

E.g.
Lets say the name of the third party DLL is myTest.dll.

Step 1: Dis-assemble the assembly, as we have to asign the strong name for DLL
ildasm myTest.dll /out:myTest.il


Create a Strong Name:
sn -k myTest.snk


Step 2: Re-Assemble using your strong-name key
ilasm myTest.il /res:myTest.res /dll /key:myTest.snk /out:myTestSN.dll

for verification you can use following command,
sn -vf myTestSN.dll