Uninstall from GAC In C# code

How do I uninstall the GAC from my C# application.

I am not able to uninstall, the particular exe and DLL from GAC.

Is it the proper way to uninstall the GAC in C# ?

public void RemoveAssembly(string ShortAssemblyName, string PublicToken)
{
    AssemblyCacheEnum AssembCache = new AssemblyCacheEnum(null);

    string FullAssembName = null;

    for (; ; )
    {
        string AssembNameLoc = AssembCache.GetNextAssembly();
        if (AssembNameLoc == null)
            break;

        string Pt;
        string ShortName = GetAssemblyShortName(AssembNameLoc, out Pt);

        if (ShortAssemblyName == ShortName)
        {

            if (PublicToken != null)
            {
                PublicToken = PublicToken.Trim().ToLower();
                if (Pt == null)
                {
                    FullAssembName = AssembNameLoc;
                    break;
                }

                Pt = Pt.ToLower().Trim();

                if (PublicToken == Pt)
                {
                    FullAssembName = AssembNameLoc;
                    break;
                }
            }
            else
            {
                FullAssembName = AssembNameLoc;
                break;
            }
        }
    }

    string Stoken = "null";
    if (PublicToken != null)
    {
        Stoken = PublicToken;
    }

    if (FullAssembName == null)
        throw new Exception("Assembly=" + ShortAssemblyName + ",PublicToken=" + 
        token + " not found in GAC");

    AssemblyCacheUninstallDisposition UninstDisp;


    AssemblyCache.UninstallAssembly(FullAssembName, null, out UninstDisp);
}


public static void UninstallAssembly(String assemblyName, InstallReference reference, out AssemblyCacheUninstallDisposition disp)
{
    AssemblyCacheUninstallDisposition dispResult = AssemblyCacheUninstallDisposition.Uninstalled;
    if (reference != null)
    {
        if (!InstallReferenceGuid.IsValidGuidScheme(reference.GuidScheme))
            throw new ArgumentException("Invalid reference guid.", "guid");
    }

    IAssemblyCache ac = null;

    int hr = Utils.CreateAssemblyCache(out ac, 0);
    if (hr >= 0)
    {
        hr = ac.UninstallAssembly(0, assemblyName, reference, out dispResult);
    }

    if (hr < 0)
    {
        Marshal.ThrowExceptionForHR(hr);
    }

    disp = dispResult;
}