What are the differences between an assembly and a namespace$$in C#$?$

An assembly defines a syntactical unit that allows for separate compilation$/$deployment whereas a namespace$$is a naming encapsulation as it is by design used to define name scopes.

While they both are encapsulation constructs,$$the assembly is like a package as it relates to name scopes and the namespace is used to connect friends like in C$++$

An assembly is designed only to allow for deploying code and as such is not an encapsulation construct whereas namespaces are.

A namespace defines a logically separate unit of compilation whereas an assembly is a packaging tool for separating name scopes.