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DebuggerTypeProxyAttribute Constructor (Type)

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

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

public DebuggerTypeProxyAttribute(
	Type type


Type: System.Type
The proxy type.


type is null.

The debugger creates a new instance of the type proxy class every time it needs to display a variable of the target type. This can have performance implications. As a result, you should not do any more work in the constructor than absolutely necessary.

The following code example shows the use of the DebuggerTypeProxyAttribute(Type) constructor to specify a debugger display proxy. This code example is part of a larger example provided for the DebuggerDisplayAttribute class.

class MyHashtable : Hashtable
    private const string TestString = "This should not appear in the debug window.";

    internal class HashtableDebugView
        private Hashtable hashtable;
        public const string TestString = "This should appear in the debug window.";
        public HashtableDebugView(Hashtable hashtable)
            this.hashtable = hashtable;

        public KeyValuePairs[] Keys
                KeyValuePairs[] keys = new KeyValuePairs[hashtable.Count];

                int i = 0;
                foreach(object key in hashtable.Keys)
                    keys[i] = new KeyValuePairs(hashtable, key, hashtable[key]);
                return keys;

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, 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.