How do I pass in a string parameter that can either be one or two within a method? selenium c#

Question

I wish to use this method in another method, but the problem is chooseFleet can either be one or two. How to do this in C#?

[TestMethod]
[TestCategory("UserMgt")]
public void CompleteRegProcessPass(string role, string chooseFleet)
{
    var blobClient = new AzureStorageBlobClient(AzureStorageBlobClient);
    _regRep.btnAddUser.Click();

    objCommon.EnterText(_regRep.firstNameAdd, userName);
    objCommon.EnterText(_regRep.lastNameAdd, "Smithy");
    objCommon.EnterText(_regRep.userEmailAdd, emailID);
    objCommon.EnterText(_regRep.userTelephoneAdd, "12345678901");
    objCommon.Exists(_regRep.userRoleManager, 10);
    objCommon.ScrollInToViewAndClick(**role**);
    objCommon.Exists(_regRep.chooseFleet, 5);
    objCommon.ScrollInToViewAndClick(cf1);
            objCommon.ScrollInToViewAndClick(cf2);
    objCommon.Click(_regRep.btnSaveUser);
    System.Threading.Thread.Sleep(1000);
}

Answer 1

public void CompleteRegProcessPass(string role, params string[] chooseFleet)

You can call it like:

CompleteRegProcessPass("role", "cf1");
CompleteRegProcessPass("role", "cf1", "cf2");

At the same time it's possible to call it like this:

CompleteRegProcessPass("role");
CompleteRegProcessPass("role", "cf1", "cf2", "cf3");

To get the best from both worlds:

public void CompleteRegProcessPass(string role, string chooseFleet1) =>
    CompleteRegProcessPassImpl(role, chooseFleet1);

public void CompleteRegProcessPass(string role, string chooseFleet1, string chooseFleet2) =>
    CompleteRegProcessPassImpl(role, chooseFleet1, chooseFleet2);

private void CompleteRegProcessPassImpl(string role, params string[] chooseFleet)
{
    ...
    foreach(var cf in chooseFleet)
    {
        objCommon.ScrollInToViewAndClick(cf);
    }
    ...
}