C# Session 3: Keywords in C#

Keywords in C#

C#.Net has some pre-defined reserved words called as Keywords, which can’t be used as Identifiers for variable, class, interface, properties etc…

Keywords has been categorized based on the type of use.

Of Type Modifiers:

Below are some modifiers which has a meaning to get modified where these are applied. It states that it allows or restricts programs/sub-programs being modified by another set of execution step/code.

                   abstract                partial

                   async                   readonly

                   const                    sealed

                   event                    static

                   extern                  unsafe

                   new                      virtual

                   override               volatile

                   const

Of Type Access Modifiers:

Access specifiers are those keywords being used with classes, methods, properties, 
interface, fields etc… to control the accessibility for that particular block/constraint 
and enables security as well.

                   public                  internal

                   private                 protected

Of Type Template:

These are the keywords usually part of a program in a sequential flow.

                   if                       in

                   else                   continue

                   do                     break

                   switch               default

                   case                  goto

                   for                    return

                   foreach             yield

                         fixed                 lock
                         unchecked        checked
                         while 
 

Of Type Method Parameters:

These keywords generally used in methods with its parameters.

                   params                ref

                         out

Of Type Namespace:

These are the keywords usually applies to namespace while importing.

             using                . operator

                   :: operator        extern alias

Of Type Access Keywords:

These keywords used to access objects/components in class or from base clases.

                   base                this

Of Type Operators:

This type of keywords performs miscellaneous actions.

                   as                     sizeof

                         await                typeof

                         new                  stackalloc

                         is                      unchecked

                         checked

Of Type Literal:

These type of keywords deals with current instance or value of an object.

                   null                 value

                         false                void

                   true                 

Of Type Contextual:

These type of keywords to be considred as keywords in certain conditions. It can be 

used as identifiers and doesn’t turns into blue color.

                   add                 value

                         var                  global                   
                         dynamic         set

Of Type Query:

These keywords are contextual keywords especially used in query using Linq.

                   from                  join

                   where                let
                   select                 in

             group                on
             into                   orderby

Type Keyword:

These are data types we have in C#.

                   bool                      in

                   byte                      long

                   char                      sbyte

                   class                     short

                   decimal                string

                   double                  struct

                   enum                    uint

                         float                      ulong
                         ushort