how to set silent mode for sauce lab pre run - C#

Multi tool use
how to set silent mode for sauce lab pre run - C#
I want to use sauce labs pre-run
capability to run some executable before my tests runs and i would like to set silent mode argument for the pre-run
capability.
Below is the code snipped what I have been trying so far.
pre-run
pre-run
DesiredCapabilities capabilities = new DesiredCapabilities();
Dictionary<string, object> obj = new Dictionary<string, object>
{
{ "executable", "http://url.to/my/executable" },
{ "background", true },
{ "timeout", 120 }
};
capabilities.SetCapability("prerun", obj);
Please suggest how can I set the silent mode here.
I know a solution in java, But not sure how to do it in C#.
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