mscorlib-4.0-offline-doxygenated-documentation/html/_architecture_8cs_source.html

 namespace System.Runtime.InteropServices
 {
     public enum Architecture
     {
         X86,
         X64,
         Arm,
         Arm64
     }
 }
System.Runtime.InteropServices.Architecture
Architecture
Indicates the processor architecture.
Definition: Architecture.cs:4

System.Runtime.InteropServices
Definition: _Activator.cs:1

System.Runtime.InteropServices.Architecture.Arm64
A 64-bit ARM processor architecture.

System.Runtime.InteropServices.Architecture.X64
An Intel-based 64-bit processor architecture.