regex – C# Distinguish between first and second match

I am using regex to extract the numbers from a string which contains a range. The range could be "less than x", "greater than x" or "between x and y":

"10 - 22"
"< 0,5"
"3,50000 - 11,0"
"< 120000"  
"> 12"

Below is the relevant code snippet. In the case of "less than x" and "greater than x" I use the RegEx (d*,d*)?(d*) to capture the integer/decimal.

Low = r.Descr.Contains('>') 
    ? new Quantity {
        Value = Convert.ToDecimal(Regex.Match(r.Descr, @"(d*,d*)?(d*)").Value)
    } 
    : r.Descr.Contains('-') 
    ? new Quantity {
        Value = Convert.ToDecimal(Regex.Match(r.Descr, @"").Value) 
    } 
    : null,
High = r.Descr.Contains('<') 
    ? new Quantity {
        Value = Convert.ToDecimal(Regex.Match(r.Descr, @"(d*,d*)?(d*)").Value) 
    }
    : r.Descr.Contains('-') 
    ? new Quantity { 
        Value = Convert.ToDecimal(Regex.Match(r.Descr, @"").Value) 
    } 
    : null,

In the case of "between x and y" I am having difficulties in constructing a RegEx which would extract the relevant number. Is there a way to do this using RegEx?