Operator cannot have 'params' parameter

• Jun 26, 2019

CodeRush Classic shows the Operator cannot have ‘params’ parameter code issue if an operator includes a params parameter.

Fix

Remove the params keyword from the operator parameter.

Purpose

Highlights the operator declarations, which would cause the params is not valid in this context compilation error.

Example

C#

public class MyData
{
    public MyData(string name, List<string> data)
    {
        Name = name;
        Data = data;
    }
    public string Name { get; set; }
    public List<string> Data { get; set; }
    public static MyData operator +(MyData d1, params MyData[] dd)
    {
        string newName = d1.Name;
        List<string> newData = d1.Data;
        foreach (MyData dat in dd)
        {
            newName += "&" + dat.Name;
            newData.AddRange(dat.Data);
        }
        return new MyData(newName, newData);
    }
}

Fix:

C#

public class MyData
{
    public MyData(string name, List<string> data)
    {
        Name = name;
        Data = data;
    }
    public string Name { get; set; }
    public List<string> Data { get; set; }
    public static MyData operator +(MyData d1, MyData[] dd)
    {
        string newName = d1.Name;
        List<string> newData = d1.Data;
        foreach (MyData dat in dd)
        {
            newName += "&" + dat.Name;
            newData.AddRange(dat.Data);
        }
        return new MyData(newName, newData);
    }
}