C#

RectangleF rect = (RectangleF)(Rectangle)conv.ConvertFromInvariantString("10,10,100,300");

Chesnokov Yuriy wrote:

the values in RectangleF are fractional

using System;
using System.ComponentModel;
using System.Drawing;
using System.Globalization;

public class RectangleFUtilities
{
    public static bool TryParse(string s, out RectangleF result)
    {
        if (string.IsNullOrEmpty(s))
        {
            result = RectangleF.Empty;
            return false;
        }
        s = s.Trim();
        if (s.Length == 0)
        {
            result = RectangleF.Empty;
            return false;
        }
        CultureInfo culture = CultureInfo.CurrentCulture;
        string[] strArray = s.Split(new char[] { culture.TextInfo.ListSeparator[0] });
        float[] numArray = new float[strArray.Length];
        for (int i = 0; i < numArray.Length; i++)
        {
            if (!float.TryParse(strArray[i], out numArray[i]))
            {
                result = RectangleF.Empty;
                return false;
            }
        }
        if (numArray.Length != 4)
        {
            result = RectangleF.Empty;
            return false;
        }
        result = new RectangleF(numArray[0], numArray[1], numArray[2], numArray[3]);
        return true;
    }

    public static string ToString(RectangleF rectangleF)
    {
        CultureInfo culture = CultureInfo.CurrentCulture;
        string separator = culture.TextInfo.ListSeparator + " ";
        TypeConverter converter = TypeDescriptor.GetConverter(typeof(float));
        string[] strArray = new string[4];
        int num = 0;
        strArray[num++] = converter.ConvertToString(null, culture, rectangleF.X);
        strArray[num++] = converter.ConvertToString(null, culture, rectangleF.Y);
        strArray[num++] = converter.ConvertToString(null, culture, rectangleF.Width);
        strArray[num++] = converter.ConvertToString(null, culture, rectangleF.Height);
        return string.Join(separator, strArray);
    }
}

l_thrd.SetApartmentState(ApartmentState.STA);