Code Inspection: Field can be made readonly (Private Accessibility)

tip

You can suppress this inspection to ignore specific issues, change its severity level to make the issues less or more noticeable, or disable it altogether.

Say you have decided to make an immutable Person class, initialized only via the constructor. You go ahead and implement the following:

public class Person
{
  private string name;
  private int age;
  public Person(string name, int age)
  {
    this.name = name;
    this.age = age;
  }
  public override string ToString() =>
    $"Name: {Name}, Age: {Age}";
}

ReSharper can detect that private name and age fields are only being assigned in the constructor and offers to create an additional safeguard — by marking them readonly, we get to ensure that this class will not inadvertently assign these fields anywhere within its methods.