Hi
i think prefix is missing for an 'empID'. If the 'EmpID is an element then you should add 'd:' ,if it is an attribute then you should add ' @ ' .
if empID is an element then the code should be
objXMLNode = XDocument.DOM.selectNodes("//dfs:myFields/dfs:dataFields/d:Service_Receipts/d:SR_Employees[d:empID = '']");
if the empID is an attribute then the code should be
objXMLNode = XDocument.DOM.selectNodes("//dfs:myFields/dfs:dataFields/d:Service_Receipts/d:SR_Employees[@empID = '']");