Hi,
apparently the samplel code is not complete for the current version, I faced
the same problem.
The issue is that the code supplied does not include 2 overloads of the
CheckAccess method.
To resolve include the following in Authorisation.cs:
// Overload for a Model operation
public bool CheckAccess(
string userName,
IntPtr userToken,
byte[] secDesc,
ModelOperation modelOperation)
{
// If the user is the administrator, allow unrestricted access.
if (0 == String.Compare(userName, m_adminUserName, true,
CultureInfo.CurrentCulture))
return true;

if (!CheckAccess(userName, userToken, secDesc, modelOperation))
return false;
else
return true;
}

// Overload for a ModelItem operation
public bool CheckAccess(
string userName,
IntPtr userToken,
byte[] secDesc,
ModelItemOperation modelItemOperation)
{
// If the user is the administrator, allow unrestricted access.
if (0 == String.Compare(userName, m_adminUserName, true,
CultureInfo.CurrentCulture))
return true;

if (!CheckAccess(userName, userToken, secDesc, modelItemOperation))
return false;
else
return true;
}
This will allow the code to compile.
Now if only it didnt give me an 'Invalid Namespace' Error when I try to run
it.... :(
Please lt me know if it works for you!

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