Authors : Jeff Shergalis
Lakhya Jyoti Nath (ljnath) Author of RandomString4Net

Date : September 2020 - October 2024

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StuceSoftware.RandomStringGenerator is a fork of RandomString4Net that has been updated to support the latest .NET versions, along with other various quality of life and performance improvements. The library is developed in C# to provide a simple means of generating random strings from various categories. (Future roadmap will include the ability to pass in user defined collections of characters for generation)

It is fast and supports string generation of various lengths. It can be used to generate either a single random string or a list of them.
Random strings can be of types lowercase, uppercase, numbers and symbols. It also allows you to generate random strings with only a subset of symbols from the supported list. It is an ideal library for use in projects such as:

• password generator
• unique-id generator
• unique filename generator
• raw data generator for data processing/parsing projects
• etc. etc.

• Supports single or multiple random string generation
• Supports random string generation from alphabet, numbers, symbols or a combination of them
• Supports customized length of random string
• Supports random length of generated strings with a fixed max length
• Supports true unique random number generation
• Support force inclusion of strings of each type
• Supports .NET Standard 2.0 & 2.1, .NET 6.0, 8.0 & 9.0

• Lowercase : abcdefghijklmnopqrstuvwxyz
• Uppercase : ABCDEFGHIJKLMNOPQRSTUVWXYZ
• Numbers : 0123456789
• Symbols : !#$%&'()*+,-./:;<=>?@[]^_`{|}~"

These types are defined by an enum CharClasses which has the [Flags] attribute, making it easy to combine the different classes.

Breaking Changes 🚨

Switched to a [Flags] enum for CharClasses

RandomStringGenerator class is now non-static. The constructor takes an IRandomSource object, which is used internally to generate random values.
Two implementations of IRandomSource are provided in the library: SystemRandomSource and SecureRandomSource.

NuGet Package StuceSoftware.RandomStringGenerator

dotnet add package StuceSoftware.RandomStringGenerator

using StuceSoftware.RandomStringGenerator;
using StuceSoftware.RandomStringGenerator.RandomSourceImplementations;
var randomStringGenerator = new RandomStringGenerator(new SystemRandomSource());
// generating one random string from lowercase alphabets
var randomString = randomStringGenerator.GetString(CharClasses.Lowercase);
System.Console.WriteLine(randomString);
// generating 100 random strings using both upper and lower case alphabet, numbers and all supported symbols
var randomAlphaNumbericStrings = randomStringGenerator.GetStrings(
 CharClasses.Lowercase | CharClasses.Uppercase | CharClasses.Numbers | CharClasses.Symbols, 100);
foreach (string s in randomAlphaNumbericStrings)
 System.Console.WriteLine(s);
// generating 200 random string using uppercase alphabet and custom symbols
var randomAlphabetWithCustomSymbols = randomStringGenerator.GetStrings(CharClasses.Uppercase, 200, "/+*-");
foreach (string s in randomAlphabetWithCustomSymbols)
 System.Console.WriteLine(s);
// generating 1000 true random strings of length 20 using uppercase alphabet with custom symbols
var trueUniqueRandomStrings = randomStringGenerator.GetStrings(CharClasses.Uppercase, 1000, 20, "/+*-", false, true);
foreach (string s in trueUniqueRandomStrings)
 System.Console.WriteLine(s);
// generating 100 random strings using both upper and lowercase alphabet, numbers and custom symbols
var randomAlphabetWithCustomSymbols = randomStringGenerator.GetStrings(CharClasses.Lowercase | CharClasses.Uppercase | CharClasses.Numbers, 100, "/+*-", forceOccuranceOfEachType: true);
foreach (string s in randomAlphabetWithCustomSymbols)
 System.Console.WriteLine(s);

Note 👀
As of version 2.0, if custom symbols are defined, there is no need to specify the symbol character class (CharClasses.Symbols), this is assumed when custom symbols are provided

If you find this library helpful, please give it a star.

Feel free to support the project here:
"Buy Me A Coffee"

Thanks in advance!

Copyright © 2024 Stuce Software Solutions under the MIT License.