how to create a grid of fixed number of rows and columns on the click of button and save on a text file

In this I am creating a grid of 2 rows and 3 column.
For stopping automatic increment of rows ,you have to set  dataGridView1.AllowUserToAddRows = false in the grid 
property..


private void button1_Click(object sender, EventArgs e)
        {
           
            dataGridView1.ColumnCount = 0;
            
            for (int I = 1; I <= 3; I++)
            {
                dataGridView1.Columns.Add("DSRO" + I, "DSRO");
            }
            dataGridView1.RowCount = 2;
        }

To open a file and saving the content in file I am using Visual Basic .
It involve following step:
1.  goto Project    then click      Add Reference  and then click Microsoft Visual Basic
2.  you have to include the namespace  using Microsoft.VisualBasic
3. you have to add another button and on the click of that button you create a text file ,reading the  data from the grid and saving it on the text file.

private void button2_Click(object sender, EventArgs e)
        {
        FileSystem.FileOpen(1, @"C:\Users\yogesh\filename.txt", OpenMode.Output, OpenAccess.Write, OpenShare.Shared, 50);

float EXE[,]=new EXE[2,3];
            for (int I = 0; I< 2; I++)
            {
               for (int J = 0; J < 3; J++)
            {  
              EXE[J] = (float)(Convert.ToDouble(dataGridView1.Rows[I].Cells[J].Value));
            }
}
for(int I=0;I<2;I++)
for (int J = 0; J < 3; J++)
            {
                FileSystem.Print(1,  EXE[I,J]);
}
}
 FileSystem.FileClose(1);