C#: How to make sure a settings variable exists before attempting to use it from another assembly?

Question

I have the following:

using CommonSettings = MyProject.Commons.Settings;

public class Foo
{
    public static void DoSomething(string str)
    {
        //How d         


        

Answer 1

This is how you deal with it:

if(CommonSettings.Default.Properties[str] != null)
{
    //Hooray, we found it!
}
else
{
    //This is a 'no go'
}