| PadStartTSource(IEnumerableTSource, Int32) | Pads a sequence with default values in the beginning if it is narrower (shorter in length) than a given width. |
| PadStartTSource(IEnumerableTSource, Int32, TSource) | Pads a sequence with a given filler value in the beginning if it is narrower (shorter in length) than a given width. An additional parameter specifies the value to use for padding. |
| PadStartTSource(IEnumerableTSource, Int32, FuncInt32, TSource) | Pads a sequence with a dynamic filler value in the beginning if it is narrower (shorter in length) than a given width. An additional parameter specifies the function to calculate padding. |