Parameters Count in C#.NET

There is no index at Parameters.Count. The last index is Parameters.Count - 1 since the index is zero-based (the first position has an index of 0 and not an index of 1):

Parameters[Parameters.Count - 1] = new SqlParameter("@success", false);
Parameters[Parameters.Count - 1].Direction = ParameterDirection.Output;

Hope that helps.

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