Weava Collection - Research on C# (Type, C, Object Type, data type, value types)

C# - Basic Syntax

• Functions are set of statements that perform a specific task
• In Object-Oriented Programming methodology, a program consists of various objects that interact with each other by means of actions
• use these keywords as identifiers, you may prefix the keyword with the @ character.

C# - Type Conversion

• explicitly by users using the pre-defined functions
• from smaller to larger integral types and conversions from derived classes to base classes
• a cast operator.
• Type Casting
• a type-safe manner

C# - Variables

• enum
• It is a good programming practice to initialize variables properly
• class
• A variable is nothing but a name given to a storage area that our programs can manipulate

C# - Program Structure

• A namespace is a collection of classes
• Methods define the behavior of the class
• the class HelloWorld contains the data and method definitions
• the using keyword is used to include the System namespace in the program
• A C# program consists of the following parts: Namespace declaration A class Class methods Class attributes A Main method Statements and Expressions Comments
• the Main method, which is the entry point for all C# programs

C# - Operators

• Arithmetic Operators Relational Operators Logical Operators Bitwise Operators Assignment Operators Misc Operators
• as Cast without raising an exception if the cast fails.
• ? : Conditional Expression
• typeof() Returns the type of a class.
• * Pointer to a variable.
• & Returns the address of an variable.
• is Determines whether an object is of a certain type.
• sizeof() Returns the size of a data type.

C# Overview

• strong resemblance with Java
• Common Language Infrastructure (CLI), which consists of the executable code and runtime environment

C# - Data Types

• The user-defined reference types are: class, interface, or delegate.
• The value types directly contain data
• Pointer type variables store the memory address of another type.
• You can store any type of value in the dynamic data type variable. Type checking for these types of variables takes place at run-time
• To get the exact size of a type or a variable on a particular platform, you can use the sizeof method.
• two forms: quoted and @quoted.
• dynamic type variables takes place at run time
• The Object Type is the ultimate base class for all data types in C# Common Type System (CTS).
• When a value type is converted to object type, it is called boxing and on the other hand, when an object type is converted to a value type, it is called unboxing.
• Example of built-in reference types are: object, dynamic, and string.
• It is derived from object type.
• Value type variables can be assigned a value directly.
• they contain a reference to the variables.
• they refer to a memory location
• object type variables takes place at compile time

C# Tutorial

• a simple, modern, general-purpose, object-oriented

C# - Constants and Literals

• An integer literal can also have a suffix that is a combination of U and L, for unsigned and long,
• The constants refer to fixed values that the program may not alter during its execution
• An integer literal can be a decimal, or hexadecimal constant. A prefix specifies the base or radix: 0x or 0X for hexadecimal, and there is no prefix id for decimal.
• A floating-point literal has an integer part, a decimal point, a fractional part, and an exponent part.
• the const keyword