C#标记符

Fields allow the following modifiers:

• Static modifier static
• Access modifiers public internal private protected
• Inheritance modifier new
• Unsafe code modifier unsafe
• Read-only modifier readonly
• Threading modifier volatile

The readonly modifier
The readonly modifier prevents a field from being modified after construction. A read-only field can be assigned only in its declaration or within the enclosing type’s constructor.
Field initialization
Field initialization is optional. An uninitialized field has a default value (0, \0, null, false). Field initializers run before constructors:

• public int Age = 10;

Declaring multiple fields together
For convenience, you may declare multiple fields of the same type in a commaseparated list. This is a convenient way for all the fields to share the same  attributes and field modifiers. For example:

• static readonly int legs = 8,
• eyes = 2;

Methods allow the following modifiers:

• Static modifier static
• Access modifiers public internal private protected
• Inheritance modifiers new virtual abstract override sealed
• Partial method modifier partial
• Unmanaged code modifiers unsafe extern

Instance constructors allow the following modifiers:

• Access modifiers public internal private protected
• Unmanaged code modifiers unsafe extern

You can pass an expression into another constructor as follows:

• public Wine (decimal price, DateTime year) : this (price, year.Year) { }