C#

string sqlQuery = "SELECT * FROM SomeTable WHERE SomeColumn = '" + _myTextBox.Text + "'";

public class NormalDistribution : IDistribution
{
public double sigma;
public double my;
private Random generator;
private double help1;
private bool help2;

public NormalDistribution()
{
	this.my = 1.0;
	this.sigma = 1.0;
	
	this.generator = new Random();

	this.help1 = 0.0;
	this.help2 = false;
}

public double Next()
{
    if (this.help2)
    {
        this.help2 = false;
        return this.help1;
    }
    else
    {
        for (; ; )
        {
            double v1 = 2 * this.generator.NextDouble() - 1;
            double v2 = 2 * this.generator.NextDouble() - 1;
            double w = v1 * v1 + v2 * v2;

            if (w <= 1)
            {
                double y = Math.Sqrt(-2 * Math.Log(w) / w);
                this.help1 = v2 * y * this.sigma + this.my;
                this.help2 = true;
                return v1 * y * this.sigma + this.my;
            }
        }
    }
}