What is strong name in c# and how can we use it?

They are the assemblies which can be uniquely identified by attaching the strong name to the dll name. It gives a unique name to each assembly of various versions. This allows solving the DLL hell problem.

A name that consists of an assembly's identity—its simple text name, version number, and culture information (if provided)—strengthened by a public key and a digital signature generated over the assembly.

A name that consists of an assembly's identity—its simple text name, version number, and culture information (if provided)—strengthened by a public key and a digital signature generated over the assembly.