C# - Fix Error - Cannot implicitly convert type 'bool?' to 'bool'.

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Error    CS0266    Cannot implicitly convert type 'bool?' to 'bool'. An explicit conversion exists (are you missing a cast?)

To fix it replace

    string test = "FALSE";
            bool? test2 = null;
            if (test2)
            {
                test = "OK";
            }

with
    string test = "FALSE";
            bool? test2 = null;
            if (test2 != null)
            {
                test = "OK";
            }