Gets the number of occurrences of the specific sequence char. This method does not perform any calculations to group counts of ambiguous symbols with corresponding unambiguous symbols. So the minimum G-C content of a DNA sequence would be calculated as GetCount('G') + GetCount('C') + GetCount('S')

Gets the number of occurrences of a specific symbol. This method does not perform any calculations to group counts of ambiguous symbols with corresponding unambiguous symbols. So the minimum G-C content of a DNA sequence would be calculated as GetCount('G') + GetCount('C') + GetCount('S')