C# Edit and Continue: error 4029
Error Message
Modifying a method inside the context of a generic type will prevent the debug session from continuing while Edit and Continue is enabled
This error indicates that you tried to modify a method, generic or not, a property, an indexer, an event, an operator, a constructor, or a destructor of a generic type. Edit and Continue does not support this type of change while debugging.
Consider the following code:
static class Utils<T> where T: System.IComparable
{
public static T Max(T item1, T item2)
{
if (item1.CompareTo(item2) > 0)
return item1;
return item2;
}
}
class Program
{
static void Main(string[] args)
{
int max = Utils<int>.Max(10, 20);
}
}
If you add a breakpoint on the line if (item1.CompareTo(item2) > 0), then start debugging and try to change > 0 to >= 0, this error occurs.
To correct this error
Undo the changes, and then continue debugging without the changes.
—or—
On the Debug menu, click Stop Debugging, make the changes, then start a new debugging session.
See Also
Reference
Supported Code Changes (C#)
Edit and Continue (Visual C#)
Concepts
Generics (C# Programming Guide)