Professional C# 6 and .NET Core 1.0. Christian Nagel

      CreationDate and MaxDocuments in the previous code snippet are treated like any other field, except that because they are read-only they cannot be assigned outside the constructors:

      It’s also worth noting that you don’t have to assign a value to a readonly field in a constructor. If you don’t do so, it is left with the default value for its particular data type or whatever value you initialized it to at its declaration. That applies to both static and instance readonly fields.

      Readonly Properties

      It is possible to create a read-only property by simply omitting the set accessor from the property definition. Thus, to make Name a read-only property, you would do the following: