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More C# Language Changes and

Updates

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Implementing New Language Features

Demo

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Named and Optional Parameters

Named parameters let you specify method

parameters with a name

Can reorder names when calling

Names arent required

Optional parameters arent required

Must be last in signature

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Caller Information

Attributes for info about calling code

CallerFilePathAttribute

CallerLineNumberAttribute

CallerMemberNameAttribute

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Covariance and Contravariance

Allow implicit conversion between types

Apply to arrays delegates and generic type

arguments

Covariance: preserves type compatibilitiy

Contravariance reverses type compatibility

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Embedded Interop Assemblies

Traditional COM References Hold all Metadata

Embedded Interop Assemblies only include the

actual methods used

No need to deploy Primary Interop Assembly

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New Command Line Options

The C# compiler has three new options

/link

/langversion

/appconfig

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Including Common .NETFramework Classes

Demo

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New Types of Interest

BigInteger

Complex

Tuple

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Lazy Initialization

Lazy allows just-in-time initialization

Object not created until first used

Can specify constructor and thread safety

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New Generic Types

ReadOnly interfaces for Lists, Collections, and

Dictionarys

New Set types

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Breaking Changes

Demo

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Breaking Changes

Lambda Expressions

LINQ Expressions

Named Arguments

Overload Resolution

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Essential Skills

Demo

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Debugging Tips

Breakpoints

Shortcut Keys

Ctrl+F10 Step Over

Ctrl+F11 Step Into

Shift+F11 Step Out

Move Cursor

Run To

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Debugger Windows

Exceptions

Autos

Locals

Watch

Immediate

Call Stack

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Building Code

Can build both Solutions and Projects

Build only what needs to be built

Rebuild

forces build of all projects Clean removes assemblies from build folder

Build Configurations

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Questions?

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