public TaskCompletionSourceInfo(Type resultType)
{
ResultType = resultType;
Type tcsType = typeof(TaskCompletionSource <>);
GenericType = tcsType.MakeGenericType(new Type[] { resultType });
TaskProperty = GenericType.GetTypeInfo().GetDeclaredProperty("Task");
TrySetResultMethod = GenericType.GetTypeInfo().GetDeclaredMethod("TrySetResult");
TrySetExceptionMethod = GenericType.GetRuntimeMethod("TrySetException", new Type[] { typeof(Exception) });
TrySetCanceledMethod = GenericType.GetRuntimeMethod("TrySetCanceled", Array.Empty <Type>());
}