How is “required” used in C#?

In C#, the term “required” is typically used to indicate that a property or field must be provided with a value. This is commonly used for data validation and model binding, ensuring that user input meets certain criteria.

In C#, you can indicate that a property is required by adding a “Required” attribute or interface to the property or field. For example:

public class Person
{
    [Required]
    public string Name { get; set; }
}

In the given example, the “Name” attribute is marked as required, meaning that a value must be provided for the “Name” attribute when instantiating the “Person” class. If no value is provided, a validation error will be thrown.

To use the “Required” attribute, you need to include the “System.ComponentModel.DataAnnotations” namespace.