ProgIdAttribute Class
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ProgIdAttribute Class


Allows the user to specify the ProgID of a class.

Namespace:   System.Runtime.InteropServices
Assembly:  mscorlib (in mscorlib.dll)


[AttributeUsageAttribute(AttributeTargets.Class, Inherited = false)]
public sealed class ProgIdAttribute : Attribute


Initializes a new instance of the ProgIdAttribute with the specified ProgID.


When implemented in a derived class, gets a unique identifier for this Attribute.(Inherited from Attribute.)


Gets the ProgID of the class.


This API supports the product infrastructure and is not intended to be used directly from your code. Returns a value that indicates whether this instance is equal to a specified object.(Inherited from Attribute.)


Returns the hash code for this instance.(Inherited from Attribute.)


Gets the Type of the current instance.(Inherited from Object.)


When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class.(Inherited from Attribute.)


When overridden in a derived class, returns a value that indicates whether this instance equals a specified object.(Inherited from Attribute.)


Returns a string that represents the current object.(Inherited from Object.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr)

Maps a set of names to a corresponding set of dispatch identifiers.(Inherited from Attribute.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.GetTypeInfo(UInt32, UInt32, IntPtr)

Retrieves the type information for an object, which can be used to get the type information for an interface.(Inherited from Attribute.)


Retrieves the number of type information interfaces that an object provides (either 0 or 1).(Inherited from Attribute.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)

Provides access to properties and methods exposed by an object.(Inherited from Attribute.)

You can apply this attribute to classes.

ProgIDs are automatically generated for a class by combining the namespace with the type name. This can produce an invalid ProgID however, as ProgIDs are limited to 39 characters and can contain no punctuation other than a period. In such case, a ProgID can be manually assigned to the class using ProgIdAttribute.

Legacy Code Example

The following example demonstrates how to apply ProgIdAttribute on a class. The application then gets all attributes of MyClass, and prints the Value property of ProgIdAttribute.

public class MyClass
    public MyClass() {}

class TestApplication
   public static void Main()
         AttributeCollection attributes;
         attributes = TypeDescriptor.GetAttributes(typeof(MyClass));
         ProgIdAttribute progIdAttributeObj = (ProgIdAttribute)attributes[typeof(ProgIdAttribute)];
         Console.WriteLine("ProgIdAttribute's value is set to : " + progIdAttributeObj.Value);
      catch(Exception e)
         Console.WriteLine("Exception : " + e.Message);

.NET Framework
Available since 1.1

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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