System.Windows.Forms.ToolBarButton.PrefixAmpersands C# (CSharp) Method

        private void PrefixAmpersands(ref string value) {
            // Due to a comctl32 problem, ampersands underline the next letter in the 
            // text string, but the accelerators don't work.
            // So in this function, we prefix ampersands with another ampersand
            // so that they actually appear as ampersands.
            //
            
            // Sanity check parameter
            //
            if (value == null || value.Length == 0) {
                return;
            }
            
            // If there are no ampersands, we don't need to do anything here
            //
            if (value.IndexOf('&') < 0) {
                return;
            }
            
            // Insert extra ampersands
            //
            StringBuilder newString = new StringBuilder();
            for(int i=0; i < value.Length; ++i) {
                if (value[i] == '&') { 
                    if (i < value.Length - 1 && value[i+1] == '&') {
                        ++i;    // Skip the second ampersand
                    }
                    newString.Append("&&");
                }
                else {
                    newString.Append(value[i]);    
                }
            }
            
            value = newString.ToString();
        }