public virtual void Revert(object previousState)
{
HostExecutionContextSwitcher executionContextSwitcher = previousState as HostExecutionContextSwitcher;
if (executionContextSwitcher == null)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_CannotOverrideSetWithoutRevert"));
}
ExecutionContext executionContext1 = Thread.CurrentThread.GetMutableExecutionContext();
ExecutionContext executionContext2 = executionContextSwitcher.executionContext;
if (executionContext1 != executionContext2)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_CannotUseSwitcherOtherThread"));
}
executionContextSwitcher.executionContext = (ExecutionContext)null;
if (executionContext1.HostExecutionContext != executionContextSwitcher.currentHostContext)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_CannotUseSwitcherOtherThread"));
}
HostExecutionContext executionContext3 = executionContextSwitcher.previousHostContext;
if (HostExecutionContextManager.CheckIfHosted() && executionContext3 != null && executionContext3.State is IUnknownSafeHandle)
{
HostExecutionContextManager.SetHostSecurityContext((SafeHandle)executionContext3.State, false, (SafeHandle)null);
}
HostExecutionContext executionContext4 = executionContext3;
executionContext1.HostExecutionContext = executionContext4;
}
public virtual void Revert(object previousState)
{
HostExecutionContextSwitcher hostExecutionContextSwitcher = previousState as HostExecutionContextSwitcher;
if (hostExecutionContextSwitcher == null)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_CannotOverrideSetWithoutRevert"));
}
ExecutionContext mutableExecutionContext = Thread.CurrentThread.GetMutableExecutionContext();
if (mutableExecutionContext != hostExecutionContextSwitcher.executionContext)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_CannotUseSwitcherOtherThread"));
}
hostExecutionContextSwitcher.executionContext = null;
HostExecutionContext hostExecutionContext = mutableExecutionContext.HostExecutionContext;
if (hostExecutionContext != hostExecutionContextSwitcher.currentHostContext)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_CannotUseSwitcherOtherThread"));
}
HostExecutionContext previousHostContext = hostExecutionContextSwitcher.previousHostContext;
if (HostExecutionContextManager.CheckIfHosted() && previousHostContext != null && previousHostContext.State is IUnknownSafeHandle)
{
IUnknownSafeHandle context = (IUnknownSafeHandle)previousHostContext.State;
HostExecutionContextManager.SetHostSecurityContext(context, false, null);
}
mutableExecutionContext.HostExecutionContext = previousHostContext;
}
public virtual object SetHostExecutionContext(HostExecutionContext hostExecutionContext)
{
if (hostExecutionContext == null)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_NotNewCaptureContext"));
}
HostExecutionContextSwitcher executionContextSwitcher = new HostExecutionContextSwitcher();
ExecutionContext executionContext = Thread.CurrentThread.GetMutableExecutionContext();
executionContextSwitcher.executionContext = executionContext;
executionContextSwitcher.currentHostContext = hostExecutionContext;
executionContextSwitcher.previousHostContext = (HostExecutionContext)null;
if (HostExecutionContextManager.CheckIfHosted() && hostExecutionContext.State is IUnknownSafeHandle)
{
IUnknownSafeHandle iunknownSafeHandle = new IUnknownSafeHandle();
executionContextSwitcher.previousHostContext = new HostExecutionContext((object)iunknownSafeHandle);
HostExecutionContextManager.SetHostSecurityContext((SafeHandle)hostExecutionContext.State, true, (SafeHandle)iunknownSafeHandle);
}
executionContext.HostExecutionContext = hostExecutionContext;
return((object)executionContextSwitcher);
}