Get values inside PropertyInfo object

I have this object propInfo (that is PropertyType) listed below that is of type ICollection and has an array of values in it.

How can I acess it's values and build a string with all of them (Strigbuilder for example)?

                var propName = m.Groups[1].Value;

                // returns ICollection
                var propInfo = baseType.GetProperty(propName);

                // Find if the prop is repetetive 
                if (typeof(IEnumerable).IsAssignableFrom(propInfo.PropertyType))
                {
                    // Get the value (multiple values inside) and create a string
                    

                }