Difference between a namespace and assembly

Namespace: It is a Collection of names wherein each name is Unique.
They form the logical boundary for a Group of classes.
Namespace must be specified in Project-Properties.

An assembly
An assembly is the primary building block of a .NET Framework application. It is a collection of functionality that is built versioned and deployed as a single implementation unit (as one or more files

1) It is an Output Unit.
2)It is a unit of Deployment & a unit of versioning.
3)Assemblies contain MSIL code.
4)Assemblies are Self-Describing. [e.g. metadata,manifest]
5)An assembly is the primary building block of a .NET Framework application.
6)It is a collection of functionality that is built, versioned, and deployed as a single implementation unit (as one or more files).
7)All managed types and resources are marked either as accessible only within their implementation unit, or by code outside that unit.