Converts the value of a Unicode character to its lowercase equivalent using the casing rules of the invariant culture.
Assembly: mscorlib (in mscorlib.dll)
If your application is unaffected by the current culture and depends on the case of a character changing in a predictable way, then use the method. The method is equivalent to ToLower(Char, CultureInfo.InvariantCulture).
Use String.ToLowerInvariant to convert a string to lowercase.
.NET FrameworkSupported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0
.NET Framework Client ProfileSupported in: 4, 3.5 SP1
Portable Class LibrarySupported in: Portable Class Library
.NET for Windows Store appsSupported in: Windows 8
Supported in: Windows Phone 8.1
Supported in: Windows Phone Silverlight 8.1
Supported in: Windows Phone Silverlight 8
Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, 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)