textblock.setvalue in c# wpf how does it work

Question

Can anyone give me information on how the setvalue on a textblock works? Can't find good information about it. definitions used in this code:

//sourcenode definition
public DependencyProperty SourceNode = 

Constants.HierarchyNodeProperty;
//HierarchyNodeProperty  definition
public static DependencyProperty HierarchyNodeProperty = DependencyProperty.RegisterAttached("SourceNode", typeof(HierarchyNode), typeof(Constants));
//textblock setvalue
this.TextBlock.SetValue(SourceNode, this);

Any information that makes sense might help. Like links etc.

Answer 1

SetValue is a function available to DependencyObjects which sets the value of a DependencyProperty to the provided value.

What your code seems to do is set the SourceNode DP of a property (named TextBlock and of unknown type) to this.

TextBlock is a poor name for a property and SourceNode is a poor name for a DP.