The special identifier
partial is used to allow developers to build classes from different files and have the compiler generate one class, combining all the partial classes. This is mostly useful for separating classes into separate blocks. For example, Visual Studio 2005 separates the UI code for forms into a separate partial class that allows you to work on the business logic separately.
|Special C# Identifiers (Contextual Keywords)
|Contextual Keywords (Used in Queries)