Can you list the types of access modifiers and their features?

In C#, there are several access modifiers that define the visibility level of class members:

• public — accessible from anywhere in the program.
• private — accessible only within the same class or struct.
• protected — accessible within the class and its derived classes.
• internal — accessible within the same assembly.
• protected internal — accessible within the same assembly or from derived classes.
• private protected — accessible within the same assembly and from derived classes.

Example:

class Example
{
    public int PublicValue;          // Accessible everywhere
    private int PrivateValue;        // Only within Example
    protected int ProtectedValue;    // In Example and subclasses
    internal int InternalValue;      // Within the assembly
    protected internal int ProtInt;  // In subclasses or within the assembly
    private protected int PrivProt;  // In subclasses within the assembly
}