C#

C# is a modern, object-oriented, and type-safe programming language.

Definition of terms/concepts

Assembly

• is the unit of packaging and deployment in .NET
• can be an application or a library

Namespace

• grouping of .NET types

Expressions

// Example
12 * 30;

Importing

• to import a namespace with the using directive

// Example
using System;

Identifiers

• are names that programmers choose for their classes, method, variables and so on.
• made up of Unicode characters starting with a letter or underscore
• case sensitive

// Example
System x Console WriteLine

Keywords

• are names that mean something special to the compiler
• most of them are reserved, which means you can't use them as identifiers
• you can use them by adding the prefix @, i.e. @foreach
• List of C# keywords

Method

• can receive input data from the caller by specifying parameters and output data back to the caller by specifying a return type

using System;

Console.WriteLine(FeetToInches(37);     // 37 is the argument

int FeetToInches(int feet)              // int feet is a parameter
...

Statements

// Example
int x = 12 * 30;
System.console.WriteLine(x);

Statement block

• series of statements surrounded by a pair of braces

// Example
{
    int x = 12 * 30;
    System.Console.WriteLine(x);
}

Resource(s)

Books

• C# 9.0 in a Nutshell: The Definitive Reference by Joseph Albahari