Error when install dll

[Ashish]

I create a new dll using following
using System;

using System.Componen tModel;

using System.Security .Permissions;

using Microsoft.Manag ementConsole;

in csharp and copy it to same path where
InstallUtil.exe exists.
When i try to install this using InstallUtil.exe it given folowing error

An exception occurred during the Rollback phase of the
System.Configur ation.Inst
all.AssemblyIns taller installer.
System.InvalidO perationExcepti on: Unable to get installer types in the
C:\WINDOW
S\Microsoft.NET \Framework\v2.0 .50727\HelloSna pin.cs.dll assembly.

Please suggest how to resolve this error