Application.ProductVersion gives NullReferenceException

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SvdSinner - 10 Nov 2006 14:38 GMT

I am working on upgrade a C# winform application from the 1.1 framework to
the 2.0 framework and experiencing a bizarre error.

When my converted aplication queries Application.ProductVersion, it throws a
System.NullReferenceException. This never happened in 1.1 and I don't think
it is supposed to work this way in 2.0.

The only solution my Google-Foo has found it make certain the main method is
named Main() not main(). This was not the problem.

How can I get the expected behavior out of Application.ProductVersion?

FWIW, my AssemblyInfo.CS contains:
[assembly : AssemblyVersion("2.2.0.0")]
which works just as expected in 1.1

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Ciaran O''Donnell - 10 Nov 2006 14:51 GMT

This is very strange as the System.Windows.Forms.Application.ProductVersion
doesnt throw exceptions and is well coded to prevent them. Post you code
incase it is something about how you are calling or using it.

Ciaran O'Donnell

> I am working on upgrade a C# winform application from the 1.1 framework to
> the 2.0 framework and experiencing a bizarre error.
[quoted text clipped - 11 lines]
> [assembly : AssemblyVersion("2.2.0.0")]
> which works just as expected in 1.1

Reply to this Message

SvdSinner - 11 Nov 2006 13:05 GMT

There isn't anything interesting about the code. It is a simple string
myVariable = "Blahblah " + Application.ProductVersion;

I tried to comment it out, and then a few lines later got a bizarre
exception about drag/drop on a line that set the Visible property of the form
to true.

Could it be possible that my 2.0 framework is corrupt somehow? Is there a
way the framework can be effectively removed and reinstalled?

> This is very strange as the System.Windows.Forms.Application.ProductVersion
> doesnt throw exceptions and is well coded to prevent them. Post you code
[quoted text clipped - 17 lines]
> > [assembly : AssemblyVersion("2.2.0.0")]
> > which works just as expected in 1.1

Reply to this Message

Ciaran O''Donnell - 13 Nov 2006 13:00 GMT

You should be able to uninstall it in 'Add/Remove Programs' and then download
a new installer for it.
Sounds like a good be, even if just to remove the option from a list of
possibles

Ciaran O'Donnell

> There isn't anything interesting about the code. It is a simple string
> myVariable = "Blahblah " + Application.ProductVersion;
[quoted text clipped - 27 lines]
> > > [assembly : AssemblyVersion("2.2.0.0")]
> > > which works just as expected in 1.1

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Application.ProductVersion gives NullReferenceException

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