Anonymous methods allow defining inline blocks of code without a name. They can accept parameters and reference types but cannot use jump statements. Partial types indicate that a class, struct, or interface is split across multiple files which are compiled together. Nullable types allow value types to represent null values by using the System.Nullable<T> struct and properties like HasValue and Value.

1. Anonymous
Methods,
Partial Types and
Nullable Types
Programming in C#
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2. Anonymous Methods

3. Anonymous Methods
an inline nameless block of code.

4. Features
accept parameters
ref, out, generic type
cannot include jump statements such as goto and break

5. Benefits
No separate named methods
Reduced number of methods
Better understanding

6. Implementation
Anonymous methods are not given any return type
Anonymous methods are not prefixed with access modifiers
https://gist.github.com/2586919

7. Referencing multiple anonymous methods
https://gist.github.com/2586945

8. Passing parameters
https://gist.github.com/2586982

9. Partial Types

10. Partial Types
indicates that other parts of the class, struct or interface can be
defined in different files or namespaces.
All the parts will be formed to the final type at compile time.

11. Partial type?
working on large projects, multiple programmers work on one class.
working with automatically generated source, code can be added to
the class without modifying the source file.

12. Implementation
Each of the partial parts of the code must have the same access
modifier
if a part of code is declared as abstract and others are declared as
public => the entire code is considered abstract.
Same as sealed class.
https://gist.github.com/2592542

13. Implementation (cont.)
Partial Class
https://gist.github.com/2592720

14. Question

15. Question

16. Nullable Types

17. Nullable types?
Before C# 2.0, only reference type could be null

18. Nullable types
Null values can be defined for the value types.
instance of the System.Nullable<T> struct.

19. Implementation
Nullable types have two properties:
HasValue
Value
can also use the == and != operators
if (x != null) y = x;
https://gist.github.com/2592834

20. Implementation (cont.)
Nullable types in Expression
https://gist.github.com/2592857

21. ?? Operator
assign a nullable type to a non-nullable type.
https://gist.github.com/2592875