var class1 = new AClass("A", "B");

var record1 = new ARecord("A", "B");

​

class1.A = "Modified";

System.Console.WriteLine(class1.A);

​

//Not allowed

//record1.a = "Modified"

​

//Use with statement to create new object

var modifiedRecord = record1 with {

    a = "modified"

};

​

System.Console.WriteLine(record1);

System.Console.WriteLine(modifiedRecord);

​

//Self assignment is allowed

record1 = record1 with {

    a = "modified"

};

System.Console.WriteLine(record1);

​

class AClass(string a, string b) {

    public string A {get;set;} = a;

};

​

record ARecord(string a, string b);