HttpRange
Defines a range of bytes within an HTTP resource, starting at an offset and
            ending at offset+count-1 inclusively.
            
                
Gets the size of the  HttpRange.  null means the range
            extends all the way to the end.
            
Gets the starting offset of the  HttpRange.
            
Creates an instance of HttpRange.
            
Check if two  HttpRange instances are equal.
            
Check if two  HttpRange instances are not equal.
            
Check if two  HttpRange instances are equal.