Why am I getting the error "Expected class, delegate, enum, interface or struct"
<p>Can anyone tell me why am I getting this error? This is my first post to this forum. The research I have done to fix the problem on my own says I may have an improper curly brace somewhere, but I cannot locate it. Any help is greatly appreciated.</p>

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<pre><code>using System;

    class Program
    {
    //declare constant
    const double ANGLES_FROM_RADIANS = 57.295779513082323;

    static void Main()
    {

        //declare vairiables
        double xc = 0.0;
        double yc = 0.0;
        double radius = 0.0;
        double theta = 0.0;

        //call methods
        double GetUserInput (ref double xc, ref double yc);
        double CalcCoords (double xc, double yc, ref double radius, ref double theta);
        double Output (double radius, double theta);
     }


    //method prologue

    static double GetUserInput (ref double xc, ref double yc)
    {
        xc = 0;
        yc = 0;
        while (xc = 0)
        {
     Console.WriteLine("Please enter a possitive, non-zero value for the  x-ccordinate   of a point.");
            xc = int.Parse(Console.ReadLine());
            if (xc &lt;= 0)
            {
                Console.WriteLine("Error, x must be greater than zero.");
            }
        }
        Console.WriteLine("Please enter a possitive value for the y-coordinate of a point.");
        yc = int.Parse(Console.ReadLine());

        Return Console.WriteLine("Your Coordinates are ({0},{1})", xc, yc);
    }

    //method prologue
    static double CalcCoords (double xc, double yc, ref double radius, ref double theta)
    {
            {
            radius = Math.sqrt((xc * yc) + (xc * yc));
            return radius;
            }
            {
            theta = Math.Atan(yc / xc) * ANGLES_FROM_RADIANS;
            return theta;
        }
    }

    //method prologue
    static double Output (double radius, double theta)
    {
        Console.WriteLine("For your polar coordinates:");
        Console.WriteLine("Distance from the origin: {0:f}", radius);
        Console.WriteLine("The angle (in degrees) from the x-axis is: {0:f3}", theta);
    }   

        Console.ReadLine();

    }//End Main()
    }//End class Program
</code></pre>
