procedure Write(
    const AValue: Byte; 
    const ADestIndex: Integer = -1
); overload;

Write is an overloaded method used to add one or more values representing the ordinal data type in AValue to the internal storage for the buffer. 

AValue is the ordinal data type with byte values to store in the buffer. 

ADestIndex marks the initial postion in the buffer where bytes representing the value are stored. The default value is -1, and indicates that bytes should be appended to any existing content in the internal storage for the buffer. When ADestIndex contains a zero or a positive value, bytes represent the ordinal data type are stored beginning at the postion indicated. Please note that any existing content in the buffer would be overwritten. 

Write stores the byte value from AValue at the required position, and adjusts the Size property to reflect the increased storage required for the buffer.