Yes, the ANT_SendBurstTransfer function only has two parameters:
byte[] data = data to send, can be any length
UInt32 completeWaitTime = Time in ms to wait for completion of transfer
Please note that byte arrays in C# have the length embedded, which is why it is no longer necessary to pass the length of the array as in C++. Also, since the managed library is channel based, it is not necessary to pass the channel number as in the C++ version.
The DEMO_NET in the ANT Windows Library package is a great starting point to get a better understanding on the usage of the managed library.