Both primary key and unique key enforces uniqueness of the column on which they are defined. But by default primary key creates a clustered index on the column, where are unique creates a nonclustered index by default. Another major difference is that, primary key doesn't allow NULLs, but unique key allows one NULL only.
LineChart.cs import the following namespaces using System.Drawing; using System.Drawing.Drawing2D; using System.Drawing.Imaging; using System.Collections; public class LineChart { public Bitmap Bitmapb; public string strTitle = "Default Title"; public ArrayList ArrayListchartValues = new ArrayList(); public float ftXorigin = 0, ftYorigin = 0; public float ftScaleX, ftScaleY; public float ftXdivs = 2, ftYdivs = 2; private int intWidth, intHeight; private Graphics Graphicsg; private Page Pagep; struct datapoint { public float ftx; public float fty; public bool bolvalid; } //initialize public LineChart(int intmyWidth, int intmyHeight, Page myPage) { intWidth = intmyWidth; intHeight = intmyHeight; ftScaleX = intmyWidth; ftScaleY = intmyHeight; Bitmapb = new Bitmap(intmyWidth, intmyHeight); Graphicsg = Graphics.FromImage(Bitmapb); Pagep = myPage; } pu...
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