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OverloadGroupAttribute Class

Provides a method for indicating which combinations of arguments are valid in an activity.

System.Object
  System.Attribute
    System.Activities.OverloadGroupAttribute

Namespace:  System.Activities
Assembly:  System.Activities (in System.Activities.dll)

[AttributeUsageAttribute(AttributeTargets.Property, AllowMultiple = true)]
public sealed class OverloadGroupAttribute : Attribute

The OverloadGroupAttribute type exposes the following members.

  NameDescription
Public methodOverloadGroupAttribute()Initializes a new instance of the OverloadGroupAttribute class.
Public methodOverloadGroupAttribute(String)Initializes a new instance of the OverloadGroupAttribute class.
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  NameDescription
Public propertyGroupNameGets the name of the OverloadGroupAttribute.
Public propertyTypeIdGets a unique identifier for this attribute. (Overrides Attribute.TypeId.)
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  NameDescription
Public methodEqualsInfrastructure. Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeReturns the hash code for this instance. (Inherited from Attribute.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodIsDefaultAttributeWhen overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute.)
Public methodMatchWhen overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
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  NameDescription
Explicit interface implemetationPrivate method_Attribute.GetIDsOfNamesMaps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.GetTypeInfoRetrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.GetTypeInfoCountRetrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.InvokeProvides access to properties and methods exposed by an object. (Inherited from Attribute.)
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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.

The RuntimeArgument.IsRequired is set to true if the System.Activities.RequiredArgumentAttribute is applied to an argument.

.NET Framework

Supported in: 4

.NET Framework Client Profile

Supported in: 4

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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