Searching an item from string builder object

StringBuilder displayList = new StringBuilder();

I have added a few items in displayList but in my code i need to search for an item in displayList how can i search an item added开发者_如何学Python to displayList please let me know

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You can't search until you convert it to string using the ToString method.

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        StringBuilder displayList = new StringBuilder();
        displayList.Append( "ABC" );
        string toFind = "B";
        if( displayList.ToString().Contains(toFind) ) {
            //found it
        }