Beginner and trying to get the tag value of a treeview.selectednod

[=?Utf-8?B?S0NCVERldg==?=]

I am trying to do this line of code:
txtBxMessageBody.Text = ".\\ " + treeView1.SelectedNode.Tag.ToString();

I am getting an error back. It is something pretty simple but I can't
figure it out.
The error is: System.NullReferenceException: Object reference not set to an
instance of an object at myMethod

This is the only line of code in the method and when I only add a string to
the .Text value it runs fine.

Any ideas?

[=?Utf-8?B?cnViZW4=?=]

either the tree view do not has a node selected (treeView1.SelectedNode ==
null)
or the tag property is not set (treeView1.SelectedNode.Tag == null)

"KCBTDev" wrote:

I am trying to do this line of code:
txtBxMessageBody.Text = ".\\ " + treeView1.SelectedNode.Tag.ToString();

I am getting an error back. It is something pretty simple but I can't
figure it out.
The error is: System.NullReferenceException: Object reference not set to an
instance of an object at myMethod

This is the only line of code in the method and when I only add a string to
the .Text value it runs fine.

Any ideas?