Can not execute SQL Server RMO PublicationMonitor TransPendingCommandInfo from a .NET 4.0 application.
or
Load LegacyV2Runtime at runtime
There are a couple of solutions to this issue. The simplest one is to add the following to App.config
xml version="1.0"?>
useLegacyV2RuntimeActivationPolicy="true">
version="v4.0" sku=".NETFramework,Version=v4.0"/>
That will allow you application to use Mixed mode assemblies (CLR 2 and 4 in this case).
However, I needed to do this programmatically at runtime as the error was occurring in a reusable user control, so I do not have access to the App.config. To do this, I borrowed the following helper class to load legacy V2 runtime :
To use this, just call and check the LegacyV2RuntimeEnabledSuccessfully before creating your class. e.g.public static class RuntimePolicyHelper { public static bool LegacyV2RuntimeEnabledSuccessfully { get; private set; } static RuntimePolicyHelper() { ICLRRuntimeInfo clrRuntimeInfo = (ICLRRuntimeInfo)RuntimeEnvironment.GetRuntimeInterfaceAsObject( Guid.Empty, typeof(ICLRRuntimeInfo).GUID); try { clrRuntimeInfo.BindAsLegacyV2Runtime(); LegacyV2RuntimeEnabledSuccessfully = true; } catch (COMException) { // This occurs with an HRESULT meaning // "A different runtime was already bound to the legacy CLR version 2 activation policy." LegacyV2RuntimeEnabledSuccessfully = false; } } [ComImport] [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] [Guid("BD39D1D2-BA2F-486A-89B0-B4B0CB466891")] private interface ICLRRuntimeInfo { void xGetVersionString(); void xGetRuntimeDirectory(); void xIsLoaded(); void xIsLoadable(); void xLoadErrorString(); void xLoadLibrary(); void xGetProcAddress(); void xGetInterface(); void xSetDefaultStartupFlags(); void xGetDefaultStartupFlags(); [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)] void BindAsLegacyV2Runtime(); } }
if (RuntimePolicyHelper.LegacyV2RuntimeEnabledSuccessfully) { DataAccessConnections.Publisher = _publisher; _replMonitorHelper = new ReplicationMonitorHelper(); } .....
