| Class | Brief description | |
| The AccessViolationException class implements an instance of an error occurring during calling an object, which has not been created yet. | ||
| The ArgumentException class implements an instance of an error, occurring when one of the arguments, passed to a property (method), is unavailable. | ||
| The ArgumentNullException class implements an instance of an error occurring during an attempt to pass the Null value to a property (method), which does not accept it as an allowed value. | ||
| The ArgumentOutOfRangeException class implements an instance of an error occurring when the value of one of the arguments passed to a property (method) is out of the boundaries of the allowed range. | ||
| The ArithmeticException class implements an instance of an error, occurring during performing some arithmetic actions, as well as operations of conversion and transformation. | ||
| The Array class implements properties and methods of the Array data type, as well as of variables, having the Array data type. | ||
| The BindingManager class implements the object enabling initialization of value editor settings. | ||
| The Boolean class represents Boolean data type. | ||
| The Broadcast class implements an object that is used to exchange messages between desktop and web applications. | ||
| The Char class represents character data type. | ||
| The CultureInfo class implements an object containing properties and methods for working with regional settings of a specific culture. | ||
| The Currency class represents currency data type. | ||
| The DateTime class represents date and time. | ||
| The Debug class implements an object that is used to display debugging messages. | ||
| The Decimal class represents high-precision decimal values. | ||
| The DivideByZeroException class implements an instance of an error occurring during overflow caused by division by 0. | ||
| The Double class represents double-precision floating-point numbers. | ||
| The Exception class represents a base class for all exceptions, which may be thrown during execution of a custom code. | ||
| The ExpressionStringHandler class contains methods that are used to implement events that occur on converting expression elements. | ||
| The ForeGarbageCollector class implements an object that is used to start garbage collection. | ||
| The ForeGC class implements static methods that are used to start garbage collection. | ||
| The GuidGenerator class implements a generator of global unique identifiers (GUID). | ||
| The IndexOutOfRangeException class implements an instance of an error occurring during calling an array element with the index out of array bounds. | ||
| The Integer class represents integer data type. | ||
| The Matrix class is a basic class used to create dynamic matrices with data. | ||
| The MatrixFactory class is used to create a matrix structure. | ||
| The NotFiniteNumberException class implements an instance of an error, occurring, when as a result of some actions, the output value is positive infinity, negative infinity, or is not a number (NaN). | ||
| The Object class is basic for all classes and types used in the Fore language. | ||
| The OleException class implements an instance of an error occurring during working with OLE objects. | ||
| The OverflowException class implements an instance of the error occurring when the internal buffer is overflowed. | ||
| Static properties of the RuntimeInterop class are used to get information on the last error occurred within the current application stream. | ||
| The StackOverflowException class implements an instance of an error occurring during stack overflow. | ||
| The String class represents string data type. | ||
| The SysEventLog class is used to create records in Windows event log. | ||
| The SysSettings class implements an object used to work with BI server settings file Settings.xml. | ||
| The TextConverter class implements a converter used to convert text to various formats. | ||
| The TimeSpan class represents time interval. | ||
| The Variant class implements properties and methods of the Variant data type, as well as of variables, having the Variant data type. | ||
| The Win32Exception class implements an instance of an error, occurring during the work of Windows API functions. |
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