首先，多大才算大？有没有办法确定一个对象在堆中有多大？.Net4.5.1带有此LargeObjectHeapCompactionMode:AftertheLargeObjectHeapCompactionModepropertyissettoGCLargeObjectHeapCompactionMode.CompactOnce,thenextfullblockinggarbagecollection(andcompactionoftheLOH)occursatanindeterminatefuturetime.YoucancompacttheLOHimmediatelybyusingc