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Squire is my personal framework I use in many of my projects. It contains many advanced utilities, predefined common classes (address, contact info, etc), and extensions. It's entire point is to get me up and running faster.

This isn't your typical "core framework/library" I've worked hard to ensure it is supporting, unrestrictive, and easy to use. Some of the key concepts embedded within it are domain-driven design, aspect-orientated programming, and what I'm going to coin game-orientated design.


Getting Started

Essential Components

The essential components are located within the Squire.Essentials nuget package.

Common Extensions

The Squire namespace contains extensions for object, IEnumerable<T>, string, and more.


using Squire;

class Program
    static void Main(string[] args)
        var collection = Enumerable.Range(1, 20);
        var type = typeof(Program);
        object obj = null;
        var linkedList = new LinkedList<int>(collection);

        // Check if a type implements an interface using the Implements<T> extension.
            Console.WriteLine("does not implement interface");

        // CoalesceToString is a ToString combined with a null check, for when you aren't sure if a value is null or not but want to print it.
        Console.Write(obj.CoalesceToString(defaultValue: "undefined");

        // Process an IEnumerable<T> in batches using the Batch extension method.
        foreach(var batch in collection.Batch(itemsPerBatch: 5))
            Console.Write("Batch: ");
            foreach(var item in batch)


        // LinkedList extensions include TakeAllAfter and TakeAllValuesAfter. 
        var first = linkedList.First();

        // TakeAllAfter enumerates all nodes after the specified the node.
        var remaining = linkedList.TakeAllAfter(first);

        // TakeAllValuesAfter enumerates all node values after the specified node.
        foreach(var i in linkedList.TakeAllValuesAfter(first))

        // DateTime extension ToJavaScriptTimeStampUtc allows you to convert a DateTime value to a JavaScript-supported UTC timestamp.
        double timestamp = DateTime.Now.ToJavaScriptTimeStampUtc();

        // Double contains an extension to convert the timestamp back to a DateTime value.
        var date = timestamp.FromJavaScriptTimeStampUtc();


Squire.Practices.IFactory<T> is a generic interface for utilizing the factory pattern.


using Squire.Practices;

class Program
    class ObjectFactory : IFactory<object>
        public object Create()
            return new object();

    static void Main(string[] args)
        IFactory<object> factory = new ObjectFactory();
        var createdObject = factory.Create();


The Squire.Validation namespace hosts a number of fluent extensions to enable simple parameter validation. Calling the VerifyParam extension method will return a validation object with the fluent calls available.

Note 1 chaining is possible by referencing the And property after each validation call.

Note 2 all of the fluent validation extensions come with error messages preset, but accept a custom validation message via the message parameter.

Note 3 all exceptions thrown derive from ArgumentException and include a custom ArgumentEmptyException for applicable cases.


using Squire.Validation;

class Program
    static void Main(string[] args)
        // this call will fail due to the first validation check that fails and throws an ArgumentException
        Foo(name: null, age: 0, key: new object(), nullableAge: null, collection: Enumerable.Empty<string>());

    static void Foo(string name, int age, object key, int? nullableAge, IEnumerable<string> collection)
        // All objects can use IsNotNull and IsSubClassOf
        key.VerifyParam("key").IsNotNull(message: "This cannot be null!")

        // This also works for nullable types

        // Strings have access to IsNotWhiteSpace IsNotBlank IsNotNull and IsNotEmpty when validating.
            .And.IsNotEmpty()      // IsNotEmpty also checks for null
            .And.IsNotWhiteSpace() // IsNotWhiteSpace also checks for empty and null
            .And.IsNotBlank();     // IsNotBlank also checks for null and empty

        // Integers have access to IsGreaterThan IsInRange and IsGreaterThanZero
            .And.IsInRange(0, 10, inclusive: false);

        // Enumerable<T> can use IsNotEmpty() to verify the collection has elements.

Bugs and Feedback

If you see a bug or have a suggestion, feel free to create an issue here.


MIT License. Copyright 2013 Daniel Krainas