>Sorry, we're a VB shop now. Just assumed C# would have CInt()
>
>I Don't have C# installed so can't test Maybe
>
>

result = DirectCast(parameters[0], Integer);

>
I was able to pass compiler errors with this code

/// <summary>
    /// Find Person Id from the Name
    /// </summary>
    /// <param name="Name">Person Name Last, First Middle</param>
    /// <param name="DOB">DOB</param> 
    /// <param name="SiteID">SiteID</param>
    /// <returns>ID</returns>    
    public static int? FindPersonID(string Name, DateTime DOB, int? SiteID)
    {
        int? result;
        SqlParameter[] parameters = new SqlParameter[4];
        parameters[0] = new SqlParameter("PersonID", SqlDbType.Int);
        parameters[0].Direction = ParameterDirection.Output;

        parameters[1] = new SqlParameter("FullName", SqlDbType.VarChar, 65);
        parameters[1].Value = Name.Trim(); 
        parameters[2] = new SqlParameter("SiteID", SqlDbType.Int);
        parameters[2].IsNullable = true; 
        parameters[2].Value = SiteID;
        parameters[3] = new SqlParameter("DOB", SqlDbType.DateTime);
        parameters[3].IsNullable = true; 
        parameters[3].Value = DOB; 
                        
        Util.RunStoredProc("FindPersonByName", parameters);
        result = (int?)parameters[0].Value;
        return result;
    }
    /// <summary>
    /// 
    /// </summary>
    /// <param name="Name"></param>
    /// <param name="SiteID"></param>
    /// <returns>ID</returns>
    public static int? FindPersonID(string Name, int? SiteID)
    { return FindPersonID(Name, DateTime.Now.AddYears(50) , SiteID); }

Now I just have to add a check for that invalid DOB and pass null to my SP in this case.

I'm not sure it's the good way of solving this particular problem, but at least I'm not getting these errors anymore (getting new, because I need one more overload).