In Some scenarios we might want to access some of the internally protected item to outside the assembly. By using the attribute [assembly: InternalsVisibleTo(“AssemblyName”)] in the assemblyInfo class you can access
the all the members and internal types to another assemblies.
For example if i want to access the below internal class and method in to another assembly
internal class InternalClass
internal void InternalMethod()
for example DemoInternal, Just a add an attribute to assemblyInfo class
[assembly: InternalsVisibleTo(“DemoInternal”)] in the InternalThings Assembly ie, Our Internal members existing project or assembly.