Hello,

After searching via Google and coming up empty, I decided to ask the gurus here on StackOverflow.

I am trying to update entries in a ConcurrentDictionary something like this:

class Class1
{
    public int Counter { get; set; }
}

class Test
{
    private ConcurrentDictionary<int, Class1> dict = new ConcurrentDictionary<int, Class1>();

    public void TestIt()
    {
        foreach (var foo in dict)
        {
            foo.Value.Counter = foo.Value.Counter + 1; // Simplified example
        }

    }
}

Essentially I need to iterate over the dictionary and update a field on each Value. I understand from the documentation that I need to avoid using the Value property. Instead I think I need to use TryUpdate except that I don’t want to replace my whole object. Instead, I want to update a field on the object.

After reading this:

http://blogs.msdn.com/b/pfxteam/archive/2010/01/08/9945809.aspx

Perhaps I need to use AddOrUpdate and simply do nothing in the add delegate.

Does anyone have any insight as to how to do this?

Thank you,

Rick