Developer Documentation Library > Data Model > Frequently asked questions > Why don't my .NET applications that were developed using Data Model 2.8.1 work in later versions of the Data Model?
 
Why don't my .NET applications that were developed using Data Model 2.8.1 work in later versions of the Data Model?
If you have .NET applications that were developed using the Data Model 2.8.1, they require post-install steps to work with the latest MDM2.dll.
Add the following steps to your installation process:
1 Open the Control Panel, and then select Administrative Tools.
2 Open Microsoft .NET Framework 1.1 Configuration.
3 Select Configured Assemblies, and then click Configure An Assembly.
4 In the Configure an Assembly dialog, select Choose an assembly from the assembly cache, and then select Choose Assembly.
5 Select MDMLib, and then click Select.
6 Click Finish.
7 The MDMLib Properties dialog opens. Click the Binding Policy tab.
8 Enter 2.81 as the Requested Version, and 2.90 as the New Version.
9 Click OK.
See also
Frequently asked questions