private bool RemoveClsExt(IClass classExtension)
{
ISchemaLock schemaLock = (ISchemaLock)classExtension;
bool result = false;
try
{
// Attempt to get an exclusive schema lock.
schemaLock.ChangeSchemaLock(esriSchemaLock.esriExclusiveSchemaLock);
// Cast the object class to the IClassSchemaEdit2 interface.
IClassSchemaEdit2 classSchemaEdit = (IClassSchemaEdit2)classExtension;
// Clear the class extension.
classSchemaEdit.AlterClassExtensionCLSID(null, null);
IObjectClassDescription featureClassDescription = new FeatureClassDescriptionClass();
classSchemaEdit.AlterInstanceCLSID(featureClassDescription.InstanceCLSID);
result = true;
}
catch
{
result = false;
}
finally
{
schemaLock.ChangeSchemaLock(esriSchemaLock.esriSharedSchemaLock);
}
return(result);
}
private bool RemoveClsInstance(IClass classInstance, UID uid)
{
ISchemaLock schemaLock = (ISchemaLock)classInstance;
bool result = false;
try
{
// Attempt to get an exclusive schema lock.
schemaLock.ChangeSchemaLock(esriSchemaLock.esriExclusiveSchemaLock);
// Cast the object class to the IClassSchemaEdit2 interface.
IClassSchemaEdit2 classSchemaEdit = (IClassSchemaEdit2)classInstance;
classSchemaEdit.AlterInstanceCLSID(uid);
result = true;
}
catch
{
result = false;
}
finally
{
schemaLock.ChangeSchemaLock(esriSchemaLock.esriSharedSchemaLock);
}
return(result);
}
