C# Common .NET Methods

Console.WriteLine()

Prints text or numbers to the screen. Example: Console.WriteLine("Hello"); prints Hello

Console.ReadLine()

Reads input from the user. Example: string name = Console.ReadLine(); stores user input in name

Math.Abs()

Returns the absolute value of a number. Example: int x = Math.Abs(-5); x is 5

Math.Pow()

Raises a number to a power. Example: double y = Math.Pow(2, 3); y is 8

Math.Sqrt()

Returns the square root of a number. Example: double y = Math.Sqrt(9); y is 3

string.Length

Returns the number of characters in a string. Example: int len = "Hello".Length; len is 5

string.ToUpper()

Converts text to uppercase. Example: string up = "hi".ToUpper(); up is "HI"

string.ToLower()

Converts text to lowercase. Example: string low = "HI".ToLower(); low is "hi"

string.Contains()

Checks if text contains a substring. Example: bool has = "Hello".Contains("H"); has is true

List.Add()

Adds an item to a list. Example: List nums = new List(); nums.Add(5); nums contains 5

List.Remove()

Removes an item from a list. Example: nums.Remove(5); nums no longer contains 5

List.Count

Returns the number of items in a list. Example: int c = nums.Count; c is 0