| [Serializable] | 
Specify multiple MethodImplOptions values using the bit-wise OR operator.
| ForwardRef | Specifies that the method is declared, but its implementation is provided elsewhere. | 
| InternalCall | Specifies an internal call. An internal call is a call to a method implemented within the common language runtime itself. | 
| NoInlining | Specifies that the method may not be inlined. | 
| PreserveSig | Specifies that the method signature is exported exactly as declared. | 
| Synchronized | Specifies the method can be executed by only one thread at a time. | 
| Unmanaged | Specifies that the method is implemented in unmanaged code. | 
Hierarchy: