This is a example stored procedure with values passed in

string storedProc = "sp_MyProcedure";

SqlCommand sc = new SqlCommand(MyProcedure, _conn);
sc.CommandType = CommandType.StoredProcedure;

sc.Parameters.Add("@aVar", SqlDbType.BigInt, 8);
sc.Parameters.Add("@anotherVar", SqlDbType.BigInt, 8);
sc.Parameters.Add("@anotherVar2", SqlDbType.Money, 8);

sc.Parameters["@aVar"].Value = someValue;
sc.Parameters["@anotherVar"].Value = some_other_value;
sc.Parameters["@anitherVar2"].Value = and_another_value;

_conn.Open(); //open your connection
sc.ExecuteNonQuery();  ///execute procedure
_conn.Close();   //close connection