treenode error

Conflicts:
	algorithm/treenode/treenode/Program.cs
Revert "treenode error"

This reverts commit fc2435385c6f4d13159dcb2c9638095048e166da.
treenodeDelete
Merge branch 'master' of https://github.com/deplax/mcnote

Conflicts:
	algorithm/treenode/treenode/Program.cs