Is there a cleaner way to handle null checking now that the ? test exists for a variable?

Question

My code currently looks like this:

if (control != null && control.Meta != null && control.State != null)
{
   ConfigureMeta(control, control.Meta);
   ConfigureColors(control, control.State);
}

Is there now another cleaner way that I could do this null check using the "?" that was added to the latest version of C#?

Answer 1

You can use the null-conditional operator (C#6) to reduce one check - added (July 2015)

null-conditional operators

Tests the value of the left-hand operand for null before performing a member access (?.) or index (?[]) operation; returns null if the left-hand operand evaluates to null.

if (control?.Meta != null && control?.State != null)
{
}

if you really really really want to make multiple checks easier and you have printable character OCD (and you just like writing methods for the fun of it)

You could use the following

public bool CheckAll(params object[] refs) => refs.All(x => x != null);

...

if (CheckAll(control?.Meta, control?.State))
{
}