The params parameter must be the last parameter in a formal parameter list

• Apr 29, 2019

CodeRush Classic shows the The params parameter must be the last parameter in a formal parameter list code issue if a params parameter is not the last parameter in the formal parameter list.

Fix

Place the parameter with the params modifier at the last position.

Purpose

Highlights the array parameter declarations, which would cause the A parameter array must be the last parameter in a formal parameter list compilation error.

Example

C#

public List<string> AddStrings(params string[] │strings, List<string> list)
{
    if (list == null)
        list = new List<string>();
    foreach (string str in strings)
        if (str.Length > 0)
            list.Add(str);
    return list;
}

Fix:

C#

public List<string>; AddStrings(List<string> list, params string[] strings)
{
    if (list == null)
        list = new List<string>;();
    foreach (string str in strings)
        if (str.Length >; 0)
            list.Add(str);
    return list;
}