Type.IsCOMObject Property

Gets a value indicating whether the Type is a COM object.

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

public bool IsCOMObject { get; }
/** @property */
public final boolean get_IsCOMObject ()

public final function get IsCOMObject () : boolean

Not applicable.

Property Value

true if the Type is a COM object; otherwise, false.

This method returns false for COM interfaces because they are not objects. COM interfaces can be implemented by Microsoft .NET Framework objects.

You can also load a COM class and get a Type object for that COM class by using the [<topic://cpgrftypelibraryimportertlbimpexe>] tool.

If the current Type represents a constructed generic type, this property applies to the generic type definition from which the type was constructed. For example, if the current Type represents MyGenericType<int> (MyGenericType(Of Integer) in Visual Basic), the value of this property is determined by MyGenericType<T>.

If the current Type represents a type parameter in the definition of a generic type or generic method, this property always returns false.

The following example shows a use of the IsCOMObject property.

public class MarshalWrapper {
    [SecurityPermission(SecurityAction.Demand, Flags=SecurityPermissionFlag.UnmanagedCode)]
    public void MarshalMethod() {
        Object obj;
        obj = Marshal.GetActiveObject("Excel.Application");
        if (Marshal.IsComObject(obj)) {

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

XNA Framework

Supported in: 1.0