Question

I’ve created class that takes Exception type in constructor

    private readonly Exception _exception;

    public StringToObject(Exception exception)
    {
        _exception = exception;
    }

i wanted to throw exception

throw new _exception("");

but i got error:
‘._exception’ is a ‘field’ but is used like a ‘type’

is any possible ways to throw it?

Answer 1

This is not a good practice at all. Doing so will cause you to lose your stack trace related information. Please consider reading this section of Eric Lippert’s blog:

Too Much Reuse

When you write

throw new Exception();

you instantiate this new exception. But then, since your private member _exception is already instantiated, you don’t need to re-instantiate it, that is instantiating an instance, which doesn’t make sense. Instead, use the following:

throw _exception;

This will do it.