Interface ISGROList

Adds element to head of list

Adds element to tail of list

Appends an array

Clears the array

Gets the array count

Deletes an item at specified index

Gets an entry at specified index

Gets head element

Gets current index

Gets tail element

Checks if enumeration is empty

Checks if there is a next item

Gets next item

Returns the last element without removing it

Removes and returns the last element

Adds an element to the end

Removes head element

Removes element at current index

Removes tail element

Resets enumeration

Resets current index

Sets an entry at specified index

Removes and returns the first element

Converts list to array

Adds an element to the beginning