How to make a DateTime object immutable (declare as const) in C#?

Question

I have attempted the following code which will not work

private const DateTime newDateTime = new DateTime(1,1,1,1,1,1);

to which the compiler states "DateTime variable cannot be declared as const".

I am wondering how to make this object immutable, as i do not want to be able to change it anywhere by mistake. This value will be used as a check value to compare other DateTime objects to.

Thanks for any help.

Answer 1

Make it static and mark with readonly keyword, i.e.:

private static readonly DateTime newDateTime = new DateTime(1,1,1,1,1,1);