title: MongoDB field-array searching (C#, How to?)
body: <p>Please tell me how make search by fields-arrays? I have some fields of type <code>List&lt;Int64&gt;</code>. For example first document has field-array with numbers [1,2,3,4] and second document has such field with numbers [4,5,6,7].</p>
  
  <p>I want to find documents where my field consists 3 and 4 numbers, so it is first document. 
  I am looking for examples that are based on official MongoDB C# driver;)</p>
  
  <p>Thank you very much!!!</p>