Overload List
public StringBuilder Insert( int index, Object value );public StringBuilder Insert( int index, char[] value );public StringBuilder Insert( int index, double value );public StringBuilder Insert( int index, char value );public StringBuilder Insert( int index, bool value );public StringBuilder Insert( int index, int value );public StringBuilder Insert( int index, string value );public StringBuilder Insert( int index, string value, int count );public StringBuilder Insert( int index, char[] value, int startIndex, int charCount );