How to hide specific Word from VSTO - Word

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VSTO

Dear All,

I want to hide specific word from paragraph.

I am able to find and make it bold specified word but unable to make it hidden. I am using below code to make it bold

int intFound = 0;
            Word.Document document = this.Application.ActiveDocument;
            Word.Range rng = document.Content;

            rng.Find.ClearFormatting();
            rng.Find.Forward = true;
            rng.Find.Text = findText;

            

            rng.Find.Execute(
                ref missing, ref missing, ref missing, ref missing, ref missing,
                ref missing, ref missing, ref missing, ref missing, ref missing,
                ref missing, ref missing, ref missing, ref missing, ref missing);
            rng.Font.Bold = 1;
            

            
            while (rng.Find.Found)
            {
                intFound++;
                rng.Find.Execute(
                    ref missing, ref missing, ref missing, ref missing, ref missing,
                    ref missing, ref missing, ref missing, ref missing, ref missing,
                    ref missing, ref missing, ref missing, ref missing, ref missing);
                rng.Font.Bold = 1;

            }

The same way if I use = rng.Font.Hidden = 1; << Not working..

Please help me on this.