Strings are immutable once they are created they cannot be changed
The functions that are used to modify string all return a new string (String is immutable)
String methods can be chained one after the other
String Formatting
- String can be concatenated using the ”+” operator but this can get messy very quickly
- Instead we can make use of
String.Format()to format a string as required - String Interpolation can also be used for formatting string. Iet is created by adding
$before the string
string firstName = "John";
string lastName = "Smith";
string myName = firstName + " " + lastName;
string alsoMyName = string.Format("{0} {1}", firstName, lastName);
string alsoMyName2 = $"{firstName} {lastName}";
Console.WriteLine(myName);
Console.WriteLine(alsoMyName);Standard numeric format strings | Microsoft Docs
Verbatim Strings
- They are string that output the value as it is special characters are not considered
- They are similar to raw strings/ triple quote strings in Python
string path = "C:\\Users\\David\\Downloads\\sample.txt";
string pathVerbatim = @"C:\Users\David\Downloads\sample.txt";
Console.WriteLine(path);
Console.WriteLine(pathVerbatim);String Builder Class
- It is a class that is used to create Mutable String
- It is defined in the
System.Textnamespace - It does not provide any of the String Searching Methods but in place of that provides String Manipulation Methods
- We are going to do a lot of manipulation of the data then string builder class should be used as they are faster and more efficient
var mutableString = new StringBuilder();
mutableString.Append('*', 10);
mutableString.AppendLine();
mutableString.Append('*', 10);
mutableString.Insert(0, "12345");
mutableString.Remove(0, 3);
Console.WriteLine(mutableString);
Console.WriteLine(mutableString[1]);