Standard Format Masks
Specifies general patterns to use for formatting, which will vary based on the culture being used
| Character | Description | Example (US English) |
| c,C | Standard currency format. | $20.99 |
| d,D | Standard decimal format. | 20.99 |
| e,E | Standard Scientific (exponential) format. | |
| f,F | Standard Fixed-point format. | 20.99 |
| g,G | General format. | 20.99 |
| n,N | Number format. | 20.99 |
Custom Format Masks
A custom numeric format pattern is specified using the following format: <.> For Example, to display 4 decimal precision with a leading sign, use the mask: -9999.9999
| Component | Description |
| <sign> | A negative sign or positive sign symbol (+ or -) |
| <integral-digits> | A series of digits specifying the integral part of the number (left of the decimal indicator). |
| <.> | A culture-specific decimal point symbol. |
| <fractional-digits> | A series of digits specifying the fractional part of the number (right of the decimal indicator). |