Char.IsDigit Method (String, Int32)
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Indicates whether the character at the specified position in a specified string is categorized as a decimal digit.
Assembly: mscorlib (in mscorlib.dll)
This method determines if a Char is a radix-10 digit. This contrasts with IsNumber, which determines if a Char is of any numeric Unicode category. Numbers include characters such as fractions, subscripts, superscripts, Roman numerals, currency numerators, encircled numbers, and script-specific digits.
Character positions in a string are indexed starting from zero.
Valid digits are members of the UnicodeCategory.DecimalDigitNumber category.
The following example demonstrates IsDigit.