Decorator pattern is a design pattern that allows objects to be decorated with additional responsibilities, dynamically, at runtime. The pattern involves creating a decorator class that wraps the original object, adding the new responsibilities to the original object's behavior. This pattern can be useful in situations where you want to add or remove responsibilities from objects dynamically, without affecting the behavior of the original objects.

The Service Locator pattern is used to maintain a centralized registry of service objects, and provides a single point of access for clients to access the services through a locator object.

The Transfer Object pattern involves a simple object used to pass data between layers, while the Data Access Object pattern involves an object used to perform CRUD operations on a database.

The Command pattern is used to allow sending requests to objects without knowing anything about the operation being requested or the receiver of the request. It provides a way to queue or log requests and acts as a marshal between the sender and the receiver.

The choice between Repository Pattern and "smart" business objects depends on the specific requirements of the project, but in general the Repository Pattern provides better separation of concerns and a common interface for data access.

The State pattern is a design pattern in which an object, called the context, holds a reference to an instance of one of several possible concrete state objects, each of which represents a distinct state of the context and implements a common state interface. The State pattern allows the context's behavior to be altered dynamically by changing its state. The State pattern is used to implement state machines, allowing an object's behavior to be altered as its internal state changes.

A Static class is a class that cannot be instantiated and can only have static members. It is a sealed class, which means it cannot be inherited. A Singleton class is a design pattern that ensures a class has only one instance while providing a global point of access to this instance. It uses a private constructor and a static instance variable to ensure that only one instance can be created. Unlike a Static class, a Singleton class can have both static and instance members.

CQRS and Event Sourcing are separate patterns and can be used independently of each other. However, using Event Sourcing with CQRS can provide benefits in terms of versioning and auditing.

The Memento pattern is used to store the state of an object so that it can be restored later.

Design Patterns are usually categorized into three types: Creational, Structural, and Behavioral. Creational patterns deal with object creation mechanisms, trying to create objects in a manner suitable to the situation. Structural patterns deal with object composition, creating relationships between objects to form larger structures. Behavioral patterns focus on communication between objects, what goes on between objects and how they operate together.