The Weird and The Wonderful

obermd wrote:

DataRecords are related to actual database records.

PIEBALDconsult wrote:

it's a coding error

public class Foo
{
    public int Bar { get; private set; }
    public int Baz { get; }
    
    public Foo(int bar, int baz)
    {
        Bar = bar; // Fine
        Baz = baz; // Also fine
    }
    
    public void Groot()
    {
        Bar = 42; // Compiles and runs
        Baz = 42; // Compiler error CS0200 - Property or indexer 'Foo.Baz' cannot be assigned to -- it is read-only
    }
}

Richard Deeming wrote:

could be modified by any code within your class

Richard Deeming wrote:

can only be initialized in the constructor

That "feature" may be good, but the implementation is not -- adding a limitation by not writing something.

var format = new DateTimeFormatInfo { TimeSeparator = "#" };
DateTime.UtcNow.ToString("hh:mm:ss", format); // 07#56#00
DateTime.UtcNow.TimeOfDay.ToString("hh\\:mm\\:ss", format); // 07:56:00

new ArgumentException(paramName: nameof(foo), message: "Bar");
new ArgumentNullException(paramName: nameof(foo), message: "Bar");