Fixing offending code

Validating-Params-Offending-Code-Fixed.cs

public DataTable GetData(DateTime valueDate, 
                         string branch, 
                         string levelName, 
                         string subLevelName, 
                         string finalLevelName)
{
    var parameters = new object[] { valueDate, branch, levelName, subLevelName, finalLevelName};
    var paramsValid = AreParamsValid(parameters);
    
    if (!paramsValid)
        return null;
    
    //Other code stuff goes here...    
}