.Net DLL to calculate roots of a specific Function

I have specific function that I need to find the real roots( not imaginaries ) . The project should be a .NET code or DLL for .NET. This is the function: SQRT((p1-x)^2 + (p2 ??" (1-x)/x)^2). Where p1 and p2 are parameters that I provide to thefunction. You need to find the first derivative of the function ( youcan get help from Wolfram Alpha Here - [[login to view URL]((p1-x)^2+%2B+(p2+??"+(1-x)/x)^2))][1] And find the real roots of the derivative. The results shouldbe returned by the function. Example of results can be found [[login to view URL]((3-x)^2+%2B+(4+??"+(1-x)/x)^2)][2]