What is the use of volatile keyword

• The volatile keyword indicates that a field might be modified by multiple threads that are executing at the same time. Fields that are declared volatile are not subject to compiler optimizations that assume access by a single thread. This ensures that the most up-to-date value is present in the field at all times.
• The volatile modifier is usually used for a field that is accessed by multiple threads without using the lock statement to serialize access.

The volatile keyword can be applied to fields of these types:

• Reference types.
• Pointer types (in an unsafe context). Note that although the pointer itself can be volatile, the object that it points to cannot. In other words, you cannot declare a “pointer to volatile.”
• Integral types such as sbyte, byte, short, ushort, int, uint, char, float, and bool.
• An enum type with an integral base type.
• Generic type parameters known to be reference types.
• IntPtr and UIntPtr.