常用 .NET Class

http://msdn.microsoft.com/en-us/library/ms229335.aspx
http://msdn.microsoft.com/en-us/library/system.array_methods.aspx
http://msdn.microsoft.com/en-us/library/system.boolean_methods.aspx
http://msdn.microsoft.com/en-us/library/system.console_methods.aspx
http://msdn.microsoft.com/en-us/library/system.convert_methods.aspx
http://msdn.microsoft.com/en-us/library/system.datetime_methods.aspx
http://msdn.microsoft.com/en-us/library/system.decimal_methods.aspx
http://msdn.microsoft.com/en-us/library/system.delegate_methods.aspx
http://msdn.microsoft.com/en-us/library/system.double_methods.aspx
http://msdn.microsoft.com/en-us/library/system.enum_methods.aspx
http://msdn.microsoft.com/en-us/library/system.int16_methods.aspx
http://msdn.microsoft.com/en-us/library/system.int32_methods.aspx
http://msdn.microsoft.com/en-us/library/system.int64_methods.aspx
http://msdn.microsoft.com/en-us/library/system.math_methods.aspx
http://msdn.microsoft.com/en-us/library/system.random_methods.aspx
http://msdn.microsoft.com/en-us/library/system.object_methods.aspx
http://msdn.microsoft.com/en-us/library/system.string_methods.aspx

http://msdn.microsoft.com/en-us/library/system.collections.arraylist_methods.aspx
http://msdn.microsoft.com/en-us/library/system.collections.stack_methods.aspx

http://msdn.microsoft.com/en-us/library/system.io.file_methods.aspx
http://msdn.microsoft.com/en-us/library/system.io.filestream_methods.aspx

http://msdn.microsoft.com/en-us/library/system.windows.forms.datagrid_methods.aspx
http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridview_methods.aspx