Suggest how to extract method

I have 3 methods( BindingSource are bindingsources, context is data context, cache -are some List for cache operations):

```
private void AddUpdateRowDocuments()
{
try
{
tRANSMITDOCDOCUMENTSRELATIONSBindingSource.EndEdit();
var t = tRANSMITDOCDOCUMENTSRELATIONSBindingSource.Current as WcfDataServiceReference.TRANSMIT_DOC_DOCUMENTS_RELATIONS;
if (t.TRANSMIT_DOC_ID == 0)
{
if (!cachetddrList.Contains(t))
{
cachetddrList.Add(t);
}
return;
}
context.UpdateObject(t);
}
catch (Exception ex)
{
logger.ErrorException(string.Empty, ex);
}
}
private void AddUpdateRowOrganizations()
{
try
{
tRANSMITDOCORGANIZATIONRELATIONSBindingSource.EndEdit();
var t = tRANSMITDOCORGANIZATIONRELATIONSBindingSource.Current as WcfDataServiceReference.TRANSMIT_DOC_ORGANIZATION_RELATIONS;
if (t.TRANSMIT_DOC_ID == 0)
{
if (!cachetdorList.Contains(t))
{
cachetdorList.Add(t);
}
return;
}
context.UpdateObject(t);
}
catch (Exception ex)
{
logger.ErrorException(string.Empty, ex);
}
}
private void AddUpdateRowPartators()
{
try
{
tRANSMITDOCPARTATORRELATIONSBindingSource.EndEdit();
var t = tRANSMITDOCPARTATORRELATIONSBindingSource.Current as WcfDataServiceReference.TRANSMIT_DOC_PARTATOR_RELATIONS;
if (t.TRANSMIT_DOC_ID == 0)
{
if (!cachetdprList.Contains(t))
{
cachetdprList.Add(t);
}
ret

Something along the lines of this. Generics aren't that difficult. Just replace every occurance of 'some desired type' with the generic identifier.

private void AddUpdateRow(BindingSource bindingSource, List cachedList)
    where T : ITransmitDocId
{
    try
    {
        bindingSource.EndEdit();
        T t = bindingSource.Current as T;
        if (t.TRANSMIT_DOC_ID == 0)
        {
            if (!cachedList.Contains(t))
            {
                cachedList.Add(t);
            }
            return;
        }
        context.UpdateObject(t);
    }
    catch (Exception ex)
    {
        logger.ErrorException(string.Empty, ex);
    }
}

The where constraint in the function definition should indicate a common interface/class in which TRANSMIT_DOC_ID is defined.

StackExchange Code Review Q#1089, answer score: 4