Binary Search Tree Delete Method

So I'm making a Binary Search tree in C#, and I'm having some troubles with my delete method. I'm pretty sure the algorithm works (The concept) but whenever I compile I get 2 errors, and I'm not sure why.

Note: I'm not use to C#, I've only been using it for about 1 day now.

Here is the delete method:

Code:

private void Delete( t data, Node<t> reference ) {
            int c = data.CompareTo( reference.data );
            if ( c < 0 || c > 0 ) {
                if ( reference.left.data == data || reference.right.data == data ) {
                    if ( reference.left.left != null )
                        reference.left = reference.left.left;
                    else if ( reference.left.left == null && reference.left.right != null )
                        reference.left = reference.left.right;
                    else
                        reference.left = null;
                }
                else
                    Delete( data, reference.left );
            }
        }

The 2 errors I keep getting are:

Code:

Error	1	Operator '==' cannot be applied to operands of type 't' and 't' Line: 83
Error	2	Operator '==' cannot be applied to operands of type 't' and 't' Line: 83

The line that it's referring to is:

Code:

if ( reference.left.data == data || reference.right.data == data ) {

If you want to see the rest of the code you can go here: http://rafb.net/p/UZm4F669.html

Thanks.

Could you not use CompareTo again here, instead of ==?

"data" is of a generic type which does not support "==" operator in general.

In you case, you can constrain T to of interface type "IComparable<T>", thus you do any comparison by using data1.CompareTo(data2) and avoid using "==".