System.Windows.Automation.AutomationElement.GetSupportedPatterns C# (CSharp) Method

        public AutomationPattern[] GetSupportedPatterns()
        {
            Array rawPatternIds;
            Array rawPatternNames;
            try
            {
                Automation.Factory.PollForPotentialSupportedPatterns(this._obj, out rawPatternIds, out rawPatternNames);
            }
            catch (System.Runtime.InteropServices.COMException e)
            {
                Exception newEx; if (Utility.ConvertException(e, out newEx)) { throw newEx; } else { throw; }
            }
            int[] patternIds = (int[])rawPatternIds;


            // This element may support patterns that are not registered for this 
            // client.  Filter them out.
            List<AutomationPattern> patterns = new List<AutomationPattern>();
            foreach (int patternId in patternIds)
            {
                AutomationPattern pattern = AutomationPattern.LookupById(patternId);
                if (pattern != null)
                {
                    patterns.Add(pattern);
                }
            }
            return patterns.ToArray();
        }

 private void EmptyTextFromChild(AutomationElement element)
 {
     if (element.GetSupportedPatterns().Contains(ValuePattern.Pattern))
     {
         ((ValuePattern)element.GetCurrentPattern(ValuePattern.Pattern)).SetValue(string.Empty);
     }
     else if (element.GetSupportedPatterns().Contains(TextPattern.Pattern))
     {
         TextPatternRange document =
             ((TextPattern)Element.GetCurrentPattern(TextPattern.Pattern)).DocumentRange;
         AutomationElement[] children = document.GetChildren();
         foreach (var child in children)
         {
             EmptyTextFromChild(child);
         }
     }
 }