Stores a 64-bit unsigned value into the stream using 7-bit encoding. The value is written 7 bits at a time (starting with the least-significant bits) until there are no more bits to write. The eighth bit of each byte stored is used to indicate whether there are more bytes following this one. There is a special optimization for UInt64 because after passing 8 7-bit values we know that there can only be 8 bits left (since the original data was 64 bits long). So, for that last byte, we can use all 8 bits. This means that the worst case size for a double is 9 bytes versus 10 which would otherwise sometimes be necessary to pass that very last bit.

'Declaration
 
Overloads Sub Write( _
   ByVal value As ULong _
) 

void Write( 
   ulong value
)