Char.IsDigit Method (String, Int32)
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 whether a Char is a radix-10 digit. This contrasts with IsNumber, which determines whether 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.
Available since 8
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Available since 8.1