Access Modifiers in C# - ablealias/asp.net GitHub Wiki

public The type or member can be accessed by any other code in the same assembly or another assembly that references it.

private The type or member can be accessed only by code in the same class or struct.

protected The type or member can be accessed only by code in the same class or struct, or in a class that is derived from that class.

internal The type or member can be accessed by any code in the same assembly, but not from another assembly.