configuration variable access

[saboorahmed]

hi
i want to access value of a variable in app.config

my config file looks like

<configuration>
  <applicationSettings>
    <wpf1.Properties.Settings>
      <setting name="ThreadDelay" serializeAs="String ">
        <value>5000</value>
      </setting>
    </wpf1.Properties.Settings>
  </applicationSettings>
</configuration>

and in code behind

string delay = System.Configuration.ConfigurationSettings.AppSettings["ThreadDelay"].ToString();

but it comes with an error that object reference not set to an instance of object

my .config filename was wpf1.config as i rename it to app.config it start working fine
any suggesstions

[tlhintoq]

TIP: When you first created your question you were asked to wrap your code with [code] tags.

It really does help a bunch. Look how much easier it is to read now that someone has done it for you. Its the button with a '#' on it. More on tags. They're cool. Check'em out.

[tlhintoq]

"How do I fix a 'object reference not set to an instance of an object' error?

The line your code stopped on while debugging holds all your answers.
One of the variables/objects was created but not initialized. For example:

string TempString;// Created but not initialized so this is still null
//versus
string TempString = string.empty;

Debug your project again. This time, when it breaks on a line look at the Locals pallet to see which variable/object is null. You can also hover your mouse over each variable and the hothelp will shows its value. One of them will be null.

my .config filename was wpf1.config as i rename it to app.config it start working fine
any suggesstions

Since renaming the file has solved the problem... what do you need suggestions for?

[stoogots2]

What it sounds like to me is that you need your config file to be named as your executablename.exe.config. That is how my config files are named after compilation. Just a thought.