How to name variables

function startEditing(){
   if (user.canEdit(currentDocument)){
      editorControl.setEditMode(true);
      setButtonDown(btnStartEditing);
   }
 }

int postalCodeDistanceMiles;
decimal reactorCoreTemperatureKelvin;
decimal altitudeMsl;
int userExperienceWongBakerPainScale

private int _Foo;
public int Foo { get { return _Foo; } set { _Foo = value; } }

_Foo = GetResult();

XmlWriterSettings xws = new XmlWriterSettings();
xws.Indent = true;
XmlWriter xw = XmlWriter.Create(outputStream, xws);

XmlWriter xw = XmlWriter.Create(
   outputStream,
   new XmlWriterSettings() { Indent=true; });

internal void WriteXml(XmlWriter xw)
    {
        if (!Active)
        {
            return;
        }
        xw.WriteStartElement(Row.Table.TableName);

        xw.WriteAttributeString("ID", Row["ID"].ToString());
        xw.WriteAttributeString("RowState", Row.RowState.ToString());

        for (int i = 0; i < ColumnManagers.Length; i++)
        {
            ColumnManagers[i].Value = Row.ItemArray[i];
            xw.WriteElementString(ColumnManagers[i].ColumnName, ColumnManagers[i].ToXmlString());
        }
        ...

RowManager r = (RowManager)sender;

        // if the settings allow adding a new row, add one if the context row
        // is the last sibling, and it is now active.
        if (Settings.AllowAdds && r.IsLastSibling && r.Active)
        {
            r.ParentRowManager.AddNewChildRow(r.RecordTypeRow, false);
        }

for(int i = 0; i< endPoint; i++) {...}

int max( int a, int b) {
    if (a > b)
       return a;
    return b;
}

for (int ii=0; ii < array.length; ii++)
{
    int element = array[ii];
    printf("%d", element);
}

for (int firstStageRocketEngineIndex = 0; firstStageRocketEngineIndex < firstStageRocketEngines.Length; firstStageRocketEngineIndex++)
{
  firstStageRocketEngines[firstStageRocketEngineIndex].Ignite();
  Thread.Sleep(100);  // Don't start them all at once. That would be bad.
}