DynamicOption PowerShell

DynamicOption class

public class DynamicOption {
    public OptionCategory Category { get; set; }
    public OptionType ExpectedType{ get; set; }
    public string Name { get; set; }
    public bool IsRequired { get; set; }
    public IEnumerable<string> PermittedValues{get; set;}
}

Dynamic Options are specified for a given category:

Value	Purpose
Category	The operation that the dynamic option is for (see [[OptionCategory enum
Type	the data type for the option (see [[OptionType enum
Name	the option name. This is exposed to the end user.
IsRequired	indicates that this option is required for this operation. If not present, the host should not proceed.
PermittedValues	a collection of possible values the user is permitted to specify.

The following example shows how to define a dynamic option.  "-Destination" is required in Install-Package.
     public void GetDynamicOptions(string category, Request request)
        {
            if (request == null){
                throw new ArgumentNullException("request");
            }

            switch ((category ?? string.Empty).ToLowerInvariant()) {
                case "install":
                    request.YieldDynamicOption("Destination", Constants.OptionType.Folder, true);
                    break;  
                case "package":
                    // put any options used when searching for packages
                    request.YieldDynamicOption("FilterOnTag", Constants.OptionType.StringArray, false);
                    break;
                default:
                    request.Warning(Resources.Messages.UnkownCategory, PackageProviderName, "GetDynamicOptions", category);
                    break;
            }
        }

For how to retrieve values of dynamic parameters, please refer to Remarks section.