c# - How can I check a value is in a range in IList

Question

I have the following code which returns IList<>

var productCodes = await ProductsService.GetAllProductsAsync();

My Model:

public int ProductStartCode { get; set; }
public int ProducEndCode { get; set; }

When create a new product code range, I would like to check the new code doesn't overlap with the existing Product codes

My Product code looks like as follows:

 ProductStartCode  ProductEndCode 
   100001            100003
   100004            100008
   100009            100011

What I am trying to accomplish I need to check,

For example if I enter: 100001, 100002, 100003 are overlapping since they in between 100001 & 100002 range, 
             100004, 100005, 100006, 100007,100008 are also overlapping since they in between 100004 & 100008 range, 

question from:https://stackoverflow.com/questions/65835171/how-can-i-check-a-value-is-in-a-range-in-ilist

Answer 1

Given a list of ranges, and a possible range to check for overlap, see if the start or end of the possible range is between any of the ranges in the list:

var isOverlapping = productCodes.Any(p => p.ProductStartCode <= possibleStartCode && possibleStartCode <= p.ProductEndCode) ||
                    productCodes.Any(p => p.ProductStartCode <= possibleEndCode && possibleEndCode <= p.ProductEndCode);