Provides a method for indicating which combinations of arguments are valid in an activity.
Assembly: System.Activities (in System.Activities.dll)
Thetype exposes the following members.
|Equals||Infrastructure. Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute.)|
|GetHashCode||Returns the hash code for this instance. (Inherited from Attribute.)|
|GetType||Gets the Type of the current instance. (Inherited from Object.)|
|IsDefaultAttribute||When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute.)|
|Match||When overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.)|
|ToString||Returns a string that represents the current object. (Inherited from Object.)|
|_Attribute.GetIDsOfNames||Maps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute.)|
|_Attribute.GetTypeInfo||Retrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute.)|
|_Attribute.GetTypeInfoCount||Retrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute.)|
|_Attribute.Invoke||Provides access to properties and methods exposed by an object. (Inherited from Attribute.)|
Arguments can be grouped together to form valid overload groups. An overload group cannot be a subset or an equivalent set of another overload group. The only exception to this rule is a subset that contains only arguments where IsRequired is false. Overload groups can overlap but it is an error if the intersection of the groups contains all the required arguments of one or both the overload groups.
An overload group is considered bound if all the IsRequired arguments in the group are bound. If a group has zero IsRequired arguments and at least one argument bound, then the group is considered bound. It is an error if none of the groups are bound unless one overload group has no IsRequired arguments in it. Binding IsRequired arguments from more than one overload group is not permitted. It is an error to have more than one overload group bound, that is, all required arguments in one overload group are bound and any argument in another overload group is also bound.
Any violation of the preceding rules results in a InvalidWorkflowException being thrown when the containing activity is prepared for execution.