obtain default values for stored proc parameter in ADO.NET?

Question

Is is possible, directly, or by executing SQL code, to obtain the default value for an imput parameter declared in a stored procedure?

eg

CREATE PROCEDURE [test]
(
 @test nvarchar(255) = "some default value"
)
AS

INSERT INTO test (test)
VALUES (@test)
GO

I want to get the "some default value" value from my application.