DebuggerTypeProxyAttribute Class
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DebuggerTypeProxyAttribute Class


Specifies the display proxy for a type.

Namespace:   System.Diagnostics
Assembly:  mscorlib (in mscorlib.dll)


[AttributeUsageAttribute(AttributeTargets.Assembly | AttributeTargets.Class | AttributeTargets.Struct, 
	AllowMultiple = true)]
public sealed class DebuggerTypeProxyAttribute : Attribute


Initializes a new instance of the DebuggerTypeProxyAttribute class using the type name of the proxy.


Initializes a new instance of the DebuggerTypeProxyAttribute class using the type of the proxy.


Gets the type name of the proxy type.


Gets or sets the target type for the attribute.


Gets or sets the name of the target type.


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


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.)

Note   Use this attribute when you need to significantly and fundamentally change the debugging view of a type, but not change the type itself.

The DebuggerTypeProxyAttribute attribute is used to specify a display proxy for a type, allowing a developer to tailor the view for the type. This attribute can be used at the assembly level as well, in which case the Target property specifies the type for which the proxy will be used. In general, this attribute specifies a private nested type that occurs within the type to which the attribute is applied. An expression evaluator that supports type viewers checks for this attribute when a type is displayed. If the attribute is found, the expression evaluator substitutes the display proxy type for the type the attribute is applied to.

When the DebuggerBrowsableAttribute is present, the debugger variable window displays only the public members of the proxy type. Private members are not displayed. The behavior of the data window is not changed by attribute-enhanced views.

To avoid unnecessary performance penalties, expression evaluators should not examine the attributes on the display proxy of the type unless the type is expanded, either through the user clicking the plus sign (+) next to the type in a data window, or through the application of the DebuggerBrowsableAttribute attribute. Therefore, it is recommended that no attributes be applied to the display type. Attributes can and should be applied within the body of the display type.

The following code example shows the use of the DebuggerTypeProxyAttribute to specify a private nested type to be used as a debugger display proxy. This code example is part of a larger example provided for the DebuggerDisplayAttribute class.

Snippet section 5 of code snippet {"project_id":"3fedad16-eaf1-41a6-8f96-0c1949c68f32","entity_id":"2ae485ea-a11c-47ea-8eef-5cc7b5763557","entity_type":"CodeSnippet","locale":"en-US"} in source file ({"filename":"/CS/program.cs","blob_type":"Source","blob_id":"-002fcs-002fprogram-002ecs","blob_revision":2}) overlaps with other snippet sections. Ensure the tags are placed correctly.

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 2.0
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1

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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