判断你从GetSetMethod中得到了什么:
MethodInfo setMethod = propInfo.GetSetMethod();
if (setMethod == null)
{
// The setter doesn't exist or isn't public.
}
或者，对Richard's answer进行不同的旋转:
if (propInfo.CanWrite && propInfo.GetSetMethod(/*nonPublic*/ true).IsPublic)
{
// The setter exists and is public.
}
请注意，如果您只想设置一个属性，只要它有setter，那么您实际上不必关心setter是否是公共的.你可以直接用它，公共的or个私有的:
// This will give you the setter, whatever its accessibility,
// assuming it exists.
MethodInfo setter = propInfo.GetSetMethod(/*nonPublic*/ true);
if (setter != null)
{
// Just be aware that you're kind of being sneaky here.
setter.Invoke(target, new object[] { value });
}