Here I mainly use four different sizes of gradient using the rectangle.
I use the size of the ellipse as 150, so in the first gradient size it will divide two colors (viz. Red & Blue) in equal size.

The main code for first type of size:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace MyBlog
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
Rectangle myGradientRectangle = new Rectangle(10, 10, 150, 150);

using (Graphics myGradientGraphic = this.CreateGraphics())
{
using (System.Drawing.Drawing2D.LinearGradientBrush myGradientBrush = new System.Drawing.Drawing2D.LinearGradientBrush(myGradientRectangle, Color.Red, Color.Blue, System.Drawing.Drawing2D.LinearGradientMode.ForwardDiagonal))
{
myGradientGraphic.FillEllipse(myGradientBrush, 10, 10, 150, 150);
}
}
}
}
}


Output of the above code looks like the below image :

DrawGradientEllipseInDifferentGradientSize1.JPG

DrawGradient3.JPG

In the second size it will divide a rectangle in two equal sizes & each size of rectangle again divides into two equal sizes (viz. Red & Blue).

Main code :

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace MyBlog
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
Rectangle myGradientRectangle = new Rectangle(10, 10, 75, 75);

using (Graphics myGradientGraphic = this.CreateGraphics())
{
using (System.Drawing.Drawing2D.LinearGradientBrush myGradientBrush = new System.Drawing.Drawing2D.LinearGradientBrush(myGradientRectangle, Color.Red, Color.Blue, System.Drawing.Drawing2D.LinearGradientMode.ForwardDiagonal))
{
myGradientGraphic.FillEllipse(myGradientBrush, 10, 10, 150, 150);
}
}
}
}
}

Output of the above code looks like the image shown below:

DrawGradientEllipseInDifferentGradientSize2.JPG

DrawGradient4.JPG

The third size will divide the rectangle into four equal sizes & each size of rectangle is again divided into two equal sizes (viz. Red & Blue).

Main code :

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

namespace MyBlog

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void button1_Click(object sender, EventArgs e)

{

Rectangle myGradientRectangle = new Rectangle(10, 10, 37, 38);
using (Graphics myGradientGraphic = this.CreateGraphics())

{

using (System.Drawing.Drawing2D.LinearGradientBrush myGradientBrush = new System.Drawing.Drawing2D.LinearGradientBrush(myGradientRectangle, Color.Red, Color.Blue, System.Drawing.Drawing2D.LinearGradientMode.ForwardDiagonal))

{

myGradientGraphic.FillEllipse(myGradientBrush, 10, 10, 150, 150);

}
}
}
}
}


The output of the above code looks like the image below:

DrawGradientEllipseInDifferentGradientSize3.JPG

DrawGradientEllipseInDifferentGradientSize3.JPG

The third size will divide a rectangle into ten equal sizes & each size of rectangle is again divided into two equal sizes (viz. Red & Blue).

Main code :

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

namespace MyBlog

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void button1_Click(object sender, EventArgs e)

{

Rectangle myGradientRectangle = new Rectangle(10, 10, 15, 15);

using (Graphics myGradientGraphic = this.CreateGraphics())

{

using (System.Drawing.Drawing2D.LinearGradientBrush myGradientBrush = new System.Drawing.Drawing2D.LinearGradientBrush(myGradientRectangle, Color.Red, Color.Blue, System.Drawing.Drawing2D.LinearGradientMode.ForwardDiagonal))

{

myGradientGraphic.FillEllipse(myGradientBrush, 10, 10, 150, 150);

}

}

}

}

}


The output of the above code looks like the image shown below:

DrawGradientEllipseInDifferentGradientSize4.JPG

DrawGradientEllipseInDifferentGradientSize4.JPG