Destination array was not long enough. Check destIndex and length,and the array's lower bounds.:
at System.Array.Copy(Array sourceArray,Int32 sourceIndex,Array destinationArray,Int32 destinationIndex,Int32 length,Boolean reliable)
at System.Collections.Generic.List`1.CopyTo(T[] array,Int32 arrayIndex)
at System.Collections.Generic.List`1.InsertRange(Int32 index,IEnumerable`1 collection)
at System.Collections.Generic.List`1.AddRange(IEnumerable`1 collection)

导致此崩溃的代码看起来像这样：

List<MyType> objects = new List<MyType>(100);
objects = FindObjects(someParam);
objects.AddRange(FindObjects(someOtherParam);

根据MSDN,List<> .AddRange()应根据需要自动调整大小：

If the new Count (the current Count plus the size of the collection) will be greater than Capacity,the capacity of the List<(Of <(T>)>) is increased by automatically reallocating the internal array to accommodate the new elements,and the existing elements are copied to the new array before the new elements are added.

有人会想到AddRange可能会抛出这种异常的情况吗？

编辑：

回答有关FindObjects()方法的问题.它基本上看起来像这样：

List<MyObject> retObjs = new List<MyObject>();

foreach(MyObject obj in objectList)
{
   if(someCondition)
       retObj.Add(obj);
}