| Type | Prefix | Example |
| Array | arr | arrShoppingList |
| Boolean | bln | blnIsPostBack |
| Byte | byt | bytPixelValue |
| Char | chr | chrDelimiter |
| DateTime | dtm | dtmStartDate |
| Decimal | dec | decAverageHeight |
| Double | dbl | dblSizeofUniverse |
| Integer | int | intRowCounter |
| Long | lng | lngBillGatesIncome |
| Object | obj | objReturnValue |
| Short | shr | shrAverage |
| Single | sng | sngMaximum |
| String | str | strFirstName |
WebControls
| Type | Prefix | Example |
| AdRotator | adrt | adrtTopAd |
| Button | btn | btnSubmit |
| Calendar | cal | calMettingDates |
| CheckBox | chk | chkBlue |
| CheckBoxList | chkl | chklFavColors |
| CompareValidator | valc | valcValidAge |
| CustomValidator | valx | valxDBCheck |
| DataGrid | dgrd | dgrdTitles |
| DataList | dlst | dlstTitles |
| DropDownList | drop | dropCountries |
| HyperLink | lnk | lnkDetails |
| Image | img | imgAuntBetty |
| ImageButton | ibtn | ibtnSubmit |
| Label | lbl | lblResults |
| LinkButton | lbtn | lbtnSubmit |
| ListBox | lst | lstCountries |
| Panel | pnl | pnlForm2 |
| PlaceHolder | plh | plhFormContents |
| RadioButton | rad | radFemale |
| RadioButtonList | radl | radlGender |
| RangeValidator | valg | valgAge |
| RegularExpression | vale | valeEmail_Validator |
| Repeater | rpt | rptQueryResults |
| RequiredFieldValidator | valr | valrFirstName |
| Table | tbl | tblCountryCodes |
| TableCell | tblc | tblcGermany |
| TableRow | tblr | tblrCountry |
| TextBox | txt | txtFirstName |
| ValidationSummary | vals | valsFormErrors |
| XML | xmlc | xmlcTransformResults |
ADO.NET
| Type | Prefix | Example |
| Connection | con | conNorthwind |
| Command | cmd | cmdReturnProducts |
| Parameter | parm | parmProductID |
| DataAdapter | dad | dadProducts |
| DataReader | dtr | dtrProducts |
| DataSet | dst | dstNorthWind |
| DataTable | dtbl | dtblProduct |
| DataRow | drow | drowRow98 |
| DataColumn | dcol | dcolProductID |
| DataRelation | drel | drelMasterDetail |
| DataView | dvw | dvwFilteredProducts |