I appreciate your inquiry about "lens" within the realm of .NET Standard technology. In this context, "lens" refers to a concept often associated with functional programming and immutable data manipulation. In .NET Standard, lenses are typically implemented as a way to efficiently modify immutable objects without changing their original state. A lens can be represented as a pair of functions: one for getting the value from an object, and another for setting the value in the object while returning a new modified copy. This approach ensures that the original object remains unchanged, promoting immutability and maintaining data integrity. Here's a simplified example using C#: public class Lens { private readonly Func getter; private readonly Func setter; public Lens(Func getter, Func setter) { this.getter = getter; this.setter = setter; } public V Get(T obj) => getter(obj); public T Set(T obj, V value) => setter(obj, value); } Using the lens: public class Person { public string Name { get; set; } } var nameLens = new Lens (p => p.Name, (p, name) => new Person { Name = name }); var person = new Person { Name = "John" }; var newNamePerson = nameLens.Set(person, "Doe"); In this example, the `nameLens` encapsulates the access and modification of the `Name` property. When using `nameLens.Set`, a new instance of `Person` is returned with the modified name, leaving the original `person` instance unaffected. This allows for predictable and controlled manipulation of immutable data, which is crucial when dealing with concurrency and maintaining data consistency. I hope this explanation sheds light on the concept of lenses in the context of .NET Standard technology. If you have further questions or need additional examples, feel free to ask!