Stack is a place in the memory where value types are stored. Heap is a place in the memory where the reference types are stored.

It is the ability to monitor an application so that information about the application’s progress, performance and status can be captured and reported.

Logging is the process of persisting information about the status of an application.

A form is a representation of any window displayed in your application. Form can be used to create standard, borderless, floating, modal windows.

A user interface container that enables a user to work with more than one document at a time. E.g. Microsoft Excel.

A user interface that is created to manage graphical user interfaces and controls into single windows. E.g. Microsoft Word

A BLOB (binary large object) is a large item such as an image or an exe represented in binary form.

ClickOnce is a new deployment technology that allows you to create and publish self-updating applications that can be installed and run with minimal user interaction.

It is a logical model for designing and querying database models. There are various ORM tools in the market like CaseTalk, Microsoft Visio for Enterprise Architects, Infagon etc.

User controls are easier to create whereas custom controls require extra effort.
User controls are used when the layout is static whereas custom controls are used in dynamic layouts.
A user control cannot be added to the toolbox whereas a custom control can be.
A separate copy of a user control is required in every application that uses it whereas since custom controls are stored in the GAC, only a single copy can be used by all applications.