Async variant of StartTransaction(IsolationLevel, String). Starts a new transaction. All database activity after this call will be ran in this transaction and all objects will participate in this transaction until its committed or rolled back. If there is a transaction in progress, an exception is thrown. Will create and open a new connection if a transaction is not open and/or available.

Task StartTransactionAsync(
	IsolationLevel isolationLevelToUse,
	string name,
	CancellationToken cancellationToken
)

Function StartTransactionAsync ( 
	isolationLevelToUse As IsolationLevel,
	name As String,
	cancellationToken As CancellationToken
) As Task