Is the below statement Valid in C# ? Using(int x=23) { }

statement is not valid. It will give below error :- 'int': type used in a using statement must be implicitly convertible to 'System.IDisposable'

Yes

Not valid, throw an error.

statement is not valid. It will give below error :- 'int': type used in a using statement must be implicitly convertible to 'System.IDisposable'