C# Using keyword- nested in single line

Question

Usually I was doing something like that (just a example):

using (Stream xmlStream = client.OpenRead(xmlUrl))
{
    using (XmlTextReader xmlReader = new XmlTextReader(xmlStream))
    {
    }
}

Isn't better to do just:

using (XmlTextReader xmlReader = new XmlTextReader(client.OpenRead(xmlUrl)))
{
}

But I'm not sure if in this short syntax all resources will be disposed (Stream) or only XmlTextReader?

Thanks in advance for your answer.

Answer 1

No; that won't guarantee that the Stream is disposed if the XmlTextReader constructor throws an exception. But you can do:

using (Stream xmlStream = client.OpenRead(xmlUrl))
using (XmlTextReader xmlReader = new XmlTextReader(xmlStream))
{
    // use xmlReader 
}