10 {
11 [return: MaybeNull]
12 get
13 {
14 object localValue = ExecutionContext.GetLocalValue(this);
15 if (localValue != null)
16 {
17 return (T)localValue;
18 }
19 return default(T);
20 }
21 set
22 {
24 }
25 }
readonly Action< AsyncLocalValueChangedArgs< T > > m_valueChangedHandler