How can I Sort this MVC Drop-Down list alphabetically but IGNORE brackets?

I have a dynamic dropdown list that I need to sort alphabetically, but the issue is, there is some text within brackets that appears on top.

I was asked to sort the text in brackets alphabetically (in this case, it begins with an "R" -- they want the "[OLD] ROI" to be placed above "ROI - English"), even though it technically sorts correctly.

Can someone please help me with a solution? I cannot find an answer anywhere, and I have honestly never done this. Thank you.

Here is the view:

<div class="form-inline">
    <div class="form-group">
        <label for="consentFormSelect">Consent Form : </label>
        <select id="consentFormSelect" class="form-control" onchange="onConsentFormSelectChange()">
            <option value="">Select An Option</option>
            @foreach (var item in Model.ConsentForms.OrderBy(m => m.CodeDesc.ToString()).ToList())
            {
                <option value="@item.CodeId">@item.CodeDesc</option>
            }
        </select>
    </div>
</div>

Screenshot of the UI:

One way (not the correct one) is to create a property inside your model:

public class ConsentForm
{ 
...
   public string CodeDescParsed 
  {
     get { return CodeDesc.Replace("[", "").Replace("]", ""); }
  }
...
}

Then:

@foreach (var item in Model.ConsentForms.OrderBy(m => m.CodeDescParsed.ToString()).ToList())

There are other ways as well, but they require advanced Linq.

You can clean the items (to remove the prefix), sort it on the cleaned value and then return the original list of values ordered based on the cleaned value.

void Main()
{
	List<string> items = new()
	{
		"[OLD] ROI English Advance Directive(18 +) ",
		"Advance Directive(18 +) (Spanish)",
		"Clinical Supervision Form ",
		"Clinical Supervision Form(Spanish) ",
		"Consent for Telehealth Services-English ",
		"Consent for Telehealth Services-Spanish ",
		"Consent for Treatment and Evaluation ",
		"Consent for Treatment and Evaluation(Spanish) ",
		"Consumer Handbook Acknowledgement ",
		"Contexture ROI English ",
		"Contexture ROI Spanish ",
		"Intake / Annual Consent Packet ",
		"Intake / Annual Consent Packet(Spanish) ",
		"ROI - English ",
		"ROI - Spanish ",
		"SUD Release SUD Release(Spanish)",
	};
	
	var sortedItems = CustomSort(items, "[OLD] ");
}

public List<string> CustomSort(List<string> items, string prefix)
{
	List<(string cleaned, string original)> cleaned = new();
	
	foreach(var i in items)
		cleaned.Add(new(i.Replace(prefix, string.Empty), i));
	var sorted = cleaned.OrderBy(i => i.cleaned).ToList();
	return sorted.Select(i => i.original).ToList();
}

sortedItems:

Advance Directive(18 +) (Spanish)
Clinical Supervision Form 
Clinical Supervision Form(Spanish) 
Consent for Telehealth Services-English 
Consent for Telehealth Services-Spanish 
Consent for Treatment and Evaluation 
Consent for Treatment and Evaluation(Spanish) 
Consumer Handbook Acknowledgement 
Contexture ROI English 
Contexture ROI Spanish 
Intake / Annual Consent Packet 
Intake / Annual Consent Packet(Spanish) 
ROI - English 
ROI - Spanish 
[OLD] ROI English Advance Directive(18 +) 
SUD Release SUD Release(Spanish)