Char.IsUpper Method (String, Int32)
Indicates whether the character at the specified position in a specified string is categorized as an uppercase letter.
Assembly: mscorlib (in mscorlib.dll)
Character positions in a string are indexed starting from zero.
Valid uppercase letters are members of the following category in UnicodeCategory: UppercaseLetter.
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.