C#

private void button1_Click(object sender, EventArgs e)
        {
            Form  Frm = GetFormByName(textBox1.Text  );
            Frm.Refresh();
            Frm.Text = "Test";
            Frm.StartPosition = FormStartPosition.CenterScreen;
            Frm.MaximizeBox = false;
            Frm.Show();
            	 
        }
 
        public Form GetFormByName(string FormName)
        {
            
            Type T = Type.GetType(FormName, false);
             
            if (T == null)
            {
                string Fullname = Application.ProductName + "." + FormName;
                T = Type.GetType(Fullname, true, true);
            }
            return (Form)Activator.CreateInstance(T);
        }

private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)
{
    Form1 form=new Form1();
    form.Show();
}

// Assume five different Forms are defined in the Project, and 'Form1 is being used as the "main Form:"

private Dictionary<string, Form> dctStrForm;

private Dictionary<string, Type> dctStrType; 

private void Form1_Load(object sender, System.EventArgs e)
{
    dctStrForm = new Dictionary<string, Form>
    {
        {"Form2", new Form2()},
        {"Form3", new Form3()},
        {"Form4", new Form4()},
        {"Form5", new Form5()}
    };

    dctStrType = new Dictionary<string, Type>
    {
        {"Form2", typeof(Form2)},
        {"Form3", typeof(Form3)},
        {"Form4", typeof(Form4)},
        {"Form5", typeof(Form5)}
    };
}

private void btnShowFormFromString_Click(object sender, System.EventArgs e)
{
    string frmCandidate = textBox1.Text;

    if (dctStrForm.ContainsKey(frmCandidate))
    {
        dctStrForm[frmCandidate].Show();
    }
    else
    {
        MessageBox.Show("I don't have a Form named: " + frmCandidate);
    }
}

private void btnCreateAndShowFormFromString_Click(object sender, System.EventArgs e)
{
    string frmCandidate = textBox1.Text;

    if (dctStrType.ContainsKey(frmCandidate))
    {
        Type newFormType = dctStrType[frmCandidate];
        Form newForm = Activator.CreateInstance(newFormType) as Form; 
        newForm.Show();
    }
    else
    {
        MessageBox.Show("I don't have a Form of Type: " + frmCandidate);
    }
}

Bernhard Hiller wrote:

What do you suggest?

Bernhard Hiller wrote:

I want to create a class which operates on an object which implements

Bastard Programmer from Hell
If you can't read my code, try converting it here[^]

Bernhard Hiller wrote:

That's not what Generics (see MSDN[^]) were meant for.

Bernhard Hiller wrote:

public FormController<T> CreateFormcontroller(T controlledForm)

is not possible because T not defined here...

public FormController<T> CreateFormcontroller<T>(T controlledForm) where T : Form, IDescribedActionsProvider
{
    ...
}

Member 10347092 wrote:

I want to that when i inherit FormBase class then it automatically gives me output as my panel is center.

Bastard Programmer from Hell
If you can't read my code, try converting it here[^]

public class MyClass
{
    public string Text { get; set; }
    public int Index { get; set; }
};

private void ExampleList()
{
    // create the list
    List<MyClass> list = new List<MyClass>();

    // create an instance
    MyClass first = new MyClass() { Text = "Hello" };

    // append this item into the list twice
    list.Add(first);
    list.Add(first);

    // create a second instance
    MyClass second = new MyClass() { Text = "Goodbye" };

    // append this item into the list
    list.Add(second);

    // if the Index property were to use the IndexOf method from the parent list,
    // below would be the results:
    System.Diagnostics.Debug.WriteLine(list[0].Index); // 0
    System.Diagnostics.Debug.WriteLine(list[1].Index); // 0
    System.Diagnostics.Debug.WriteLine(list[2].Index); // 1
}

Chris Copeland wrote:

Obviously if multiple instances of the same object is going to be an issue

public class MyClass: ICloneable
{
    public string Id = Guid.NewGuid().ToString();
    public string Text { get; set; }

    public override string ToString()
    {
        return Text;
    }

    public override int GetHashCode()
    {
        return Id.GetHashCode();
    }

    public object Clone()
    {
        return new MyClass() { Text = this.Text };
    }
}

Bastard Programmer from Hell
If you can't read my code, try converting it here[^]