Char.IsUpper 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 an uppercase letter.
Assembly: mscorlib (in mscorlib.dll)
Return Value
Type: System.Booleantrue if the character at position index in s is an uppercase letter; otherwise, false.
| Exception | Condition |
|---|---|
| ArgumentNullException | s is Nothing. |
| ArgumentOutOfRangeException | index is less than zero or greater than the last position in s. |
Character positions in a string are indexed starting from zero.
Valid uppercase letters are members of the following category in UnicodeCategory: UppercaseLetter.
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