Proposal: Introduce non-null-coalescing operator (opposite of null-coalescing operator)

[lauxjpn]

Currently there exists the widely popular ?? null-coalescing operator:

var myString = someString == null ? "my-default-string-value" : someString;
var myString = someString ?? "my-default-string-value";

However, there are also many instances, when you would need the opposite, for which I propose a !? non-null-coalescing operator:

var myString = someString != null ? $"This is {someString}" : null;
var myString = someString !? $"This is {someString}"; // <-- proposed non-null-coalescing operator syntax

[CyrusNajmabadi]

someString !? $"This is {someString}" this is already a legal start of an expression. ! is the null suppression operator, and ? is part of the ternary operator.