How to build a update query in c# for MongoDB

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C#

MongoDB

Here is a temp data for which a update query should be built

{
    "ID" : 2014,
    "Reason" : "Message",
    "Modules" : [ 
        "AA","BB","CC"
    ],
    "Script" : {
	"Title":"Hello"
        "Informational" : "Hi How are you"
    }
}

where Modules[] may vary in size and Title under scripts is optional.