If the method that calls the Assembly.GetCallingAssembly method is expanded inline by the just-in-time (JIT) compiler, or if its caller is expanded inline, the assembly that is returned by Assembly.GetCallingAssembly may differ unexpectedly. For example, consider the following methods and assemblies:

• Method M1 in assembly A1 calls Assembly.GetCallingAssembly.

• Method M2 in assembly A2 calls M1.

• Method M3 in assembly A3 calls M2.

When M1 is not inlined, Assembly.GetCallingAssembly returns A2. When M1 is inlined, Assembly.GetCallingAssembly returns A3. Similarly, when M2 is not inlined, Assembly.GetCallingAssembly returns A2. When M2 is inlined, Assembly.GetCallingAssembly returns A3.

This effect also occurs when M1 executes as a tail call from M2, or when M2 executes as a tail call from M3. You can prevent the JIT compiler from inlining the method that calls Assembly.GetCallingAssembly, by applying the System.Runtime.CompilerServices.MethodImplAttribute attribute with the System.Runtime.CompilerServices.MethodImplOptions.NoInlining flag, but there is no similar mechanism for preventing tail calls.

Namespace: System.Reflection
Assembly: mscorlib (in mscorlib.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0, 4.0.0.0