RedCorners 18.0.0

dotnet add package RedCorners --version 18.0.0
NuGet\Install-Package RedCorners -Version 18.0.0
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="RedCorners" Version="18.0.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add RedCorners --version 18.0.0
#r "nuget: RedCorners, 18.0.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install RedCorners as a Cake Addin
#addin nuget:?package=RedCorners&version=18.0.0

// Install RedCorners as a Cake Tool
#tool nuget:?package=RedCorners&version=18.0.0


RedCorners brings some neat utilities to your C# projects.

For more documentation, visit


RedCorners offers a number of extension methods to boost productivity. All extensions are under the RedCorners namespace:

using RedCorners;

String Manipulation

string string.Head(int take = 20)

This method returns the first take=20 characters of a non-null string. If the original input has less of equal to take characters, the original string is returned, otherwise the output contains the first take characters from the input, followed by ..., making it a take+3 characters output.

In case the input is null, an empty string is returned.


Console.WriteLine($"Hello, World! This is a very long text.".Head());
Console.WriteLine($"Hello, World! This is a very long text.".Head(100));
// Hello, World! This i...
// Hello, World! This is a very long text.
HashSet<string> string.Hashtags()

This method takes a string as an input, and returns a HashSet<string> containing the hashtags mentioned in the input. If the input is null, an empty HashSet<string> is returned.

Hashtags are converted to LowerInvariant forms.


string input = "Hello #World #EVERYBODY!";
var hashtags = input.Hashtags();
Console.WriteLine($"Hashtags: {string.Join(" ", hashtags)}");
// Hashtags: #world #everybody
string string.RemoveDuplicateTags(...)
string.RemoveDuplicateTags(bool humanFormatted = false, string separator = ",")

This method takes a separator separated input containing tags, removes duplicate tags, trims tags and converts them to lowercase, and returns a new string with the result. If humanFormatted is true, the output tags will have a space between them. Example:

Console.WriteLine("food, Drinks, FooD,fun".RemoveDuplicateTags());
Console.WriteLine("food, Drinks, FooD,fun".RemoveDuplicateTags(true));
// food,drinks,fun
// food, drinks, fun
string string.RemovePrefix(string prefix)

This method returns a string without the specified prefix. If the input is null, null is returned. Examples:

Console.WriteLine("Hello, World!".RemovePrefix("Hello"));
Console.WriteLine("Hello, World!".RemovePrefix("Foo"));
// , World!
// Hello, World!
bool string.IsValidEmail()

This method returns true if the input is a valid email address. It relies on System.Net.Mail.MailAddress. Example:

Assert(!"not an email address");

I/O Extensions

string string.CreateDirectoryAndReturn()

This method takes a path as its input, creates that path if it doesn't exist, and returns the input. It is useful when chained with other I/O actions. Example:

this.FilePath = Path
    .Combine(basePath, "ObjectStorage", bucket, typeFileName)

Date/Time Extensions

DateTime long.DateFromEpochMs()

This method returns a UTC DateTime equivalent to the input long in milliseconds. Example:

long epoch = 1557738320000;
// 5/13/2019 9:05:20 AM
long DateTime.ToEpochMs()

This method is the opposite of long.DateFromEpochMs(), where it converts a DateTime to epoch milliseconds, as long.

int DateTime.ToWeekNumber()

This method returns the week number for the input DateTime, relative to 2019-03-11.

DateTime int.GetFirstDayOfWeek()

This method returns the DateTime for the first day of the input week number. Example:

DateTime input = DateTime.UtcNow;
int weekNumber = input.ToWeekNumber();
// 5/13/2019 9:20:15 AM
// 9
// 5/13/2019 12:00:00 AM
// 5/20/2019 12:00:00 AM
DateTime int.GetLastDayOfWeek()

This method returns the DateTime for the first day of the next week. Identical to:

(weeknumber + 1).GetFirstDayOfWeek();

Injection Extensions

RedCorners provides extensions that facilitate converting data where models have different base classes, but share some properties.

void Inject(object destination)

This method looks at the properties of the destination object, and where there is an identical property in the source, it copies the value of the source to that property of the destination. Example:

class Contact
    public int Id { get; set; }
    public int Name { get; set; }
    public int Email { get; set; }

class UpdateContactModel
    public int Name { get; set; }
    public int Email { get; set; }


Contact original = new Contact {
    Id = 10,
    Name = "John",
    Email = ""

UpdateContactModel update = new UpdateContactModel {
    Name = "Sarah",
    Email = ""

// Inject Name and Email from [update] to [original]

// Prints [10], because UpdateContactModel doesn't have a property named [Id]

// Prints [Sarah], because it was injected from the UpdateContactModel
T object.ReturnAs<T>() where T : new()

This method injects an object to a new object of type T and returns the new T. Example:

Contact contact = update.ReturnAs<Contact>();

// Prints [0], because UpdateContactModel doesn't have a property named [Id], so the default(int) is used.

// Prints [Sarah], because it was injected from the UpdateContactModel
List<T> IEnumerable<object>.ReturnAsList<T>() : where T : new()

This method returns a list of objects of type T from an arbitrary list of objects of any type, by doing one-by-one Injects.


Components are under the RedCorners.Components namespace.


RedCorners.Components.Benchmark is using a Stopwatch to time some actions. Example:

Benchmark benchmark = new Benchmark();
await Task.Delay(1234);
await Task.Delay(4321);
// 1.24s
// 5.57s
TimeSpan Benchmark.Stop()

Stops the timer and returns the duration as a TimeSpan.

string Benchmark.ToString()

Returns the duration as a string with two decimal points and the s prefix. Does not stop the timer, and can be used multiple times.

string Benchmark.StopToString()

Same as ToString(), but stops the timer.

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 was computed. 
.NET Framework net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Additional computed target framework(s)
Learn more about Target Frameworks and .NET Standard.
  • .NETStandard 2.0

    • No dependencies.

NuGet packages (6)

Showing the top 5 NuGet packages that depend on RedCorners:

Package Downloads

Side Bar, Tabbed View and more for your Xamarin.Forms projects.


Advanced Google Maps for Xamarin Forms (iOS and Android).


Easy cross-platform storage of settings as JSON in C#.


Client for POIWorld and Wikidata


API Client for RedCorners Backends.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
18.0.0 423 12/4/2022
17.0.0 390 12/4/2022
16.0.0 278 12/4/2022
15.0.0 285 12/4/2022
14.0.0 3,724 5/29/2022
13.0.0 1,542 5/27/2022
12.0.0 411 5/22/2022
11.0.0 413 5/7/2022
10.0.0 398 5/6/2022
9.0.1 426 4/11/2022
9.0.0 403 4/11/2022
8.0.0 26,815 2/26/2020
7.0.0 766 1/28/2020
6.0.0 4,006 12/18/2019
5.0.0 10,183 7/7/2019
4.11.0 1,794 6/20/2019
4.10.0 1,325 6/18/2019
4.1.4 711 6/17/2019
4.1.3 508 6/17/2019
4.1.2 3,911 5/17/2019
4.1.1 2,313 5/13/2019
4.0.0 3,756 3/17/2019

RedCorners brings some neat utilities to your C# projects.