I am running following query in RoboMongo which seems to work fine.
db.runCommand(
{"find":"Equity","filter":{"Ticker": "IBM US Equity"}}
)

I want to run same query using C# driver version - 1.10.1.73
I see following error while running query:
Command 'find' failed: Failed to parse: filter: "'Ticker': 'IBM US Equity'". 'filter' field must be of BSON type Object. (response:

{ "waitedMS" : NumberLong(0), "ok" : 0.0, "errmsg" : "Failed to parse: filter: \"'Ticker': 'IBM US Equity'\". 'filter' field must be of BSON type Object.", "code" : 9 }

)