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

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}";
}
        

Public Class Person
	Private name As String
	Private age As Integer
	Public Sub New(name As String, age As Integer)
		Me.name = name
		Me.age = age
	End Sub
	Public Overrides Function ToString() As String
		Return String.Format("Name: {0}, Age: {1}", name, age)
	End Function
End Class
        

JetBrains Rider 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.

Last modified: 07 April 2022