Fix some compiler warnings

Author: dsn27

CADability/BRepIntersection.cs

@@ -9472,7 +9472,7 @@ private void createNewEdges()
                             (tr as IGeoObject).UserData.Add("DebugIntersectionBy2", item.Key.face2.GetHashCode());
                             if (con2 is InterpolatedDualSurfaceCurve.ProjectedCurve)
                             {
-                                BSpline2D dbgbsp2d = (con2 as InterpolatedDualSurfaceCurve.ProjectedCurve).ToBSpline(0.0);
+                                BSpline2D dbgbsp2d = (con2 as InterpolatedDualSurfaceCurve.ProjectedCurve).ToBspline(0.0);
                             }
 #endif
                             if (dirs1) // the trimming of BSplines is sometimes not very exact

CADability/Edge.cs

@@ -1919,7 +1919,7 @@ internal void UpdateInterpolatedDualSurfaceCurve()
                     curve3d = dsc.ToBSpline(Precision.eps);
                     if (curveOnPrimaryFace is InterpolatedDualSurfaceCurve.ProjectedCurve)
                     {
-                        curveOnPrimaryFace = (curveOnPrimaryFace as InterpolatedDualSurfaceCurve.ProjectedCurve).ToBSpline(Precision.eps);
+                        curveOnPrimaryFace = (curveOnPrimaryFace as InterpolatedDualSurfaceCurve.ProjectedCurve).ToBspline(Precision.eps);
                     }
                 }
             }

CADability/GaussNewtonMinimizer.cs

@@ -492,7 +492,6 @@ void efunc(double[] parameters, out double[] values)
                 double a = parameters[0];
                 double b = parameters[1];
                 double c = parameters[2];
-                double d = -1;
                 for (int i = 0; i < points.Length; i++)
                 {
                     double px = points[i].x + dx;

CADability/JsonSerialize.cs

@@ -1304,7 +1304,7 @@ private void WriteObject(object val)
                                     (this as IJsonWriteData).AddProperty(pi[i].Name, pval);
                                     serialized = true; // at least one property can be read and written
                                 }
-                                catch (TargetInvocationException t) { }
+                                catch (TargetInvocationException) { }
                             }
                         }
                     }

CADability/Parametric.cs

@@ -1072,10 +1072,10 @@ public bool Apply()
                         involvedFaces.Add(edge.PrimaryFace);
                         involvedFaces.Add(edge.SecondaryFace);
                     }
-                    else
-                    {
-                        // return false; // edge could not be recalculated, the modification is not possible
-                    }
+                    //else
+                    //{
+                    // return false; // edge could not be recalculated, the modification is not possible
+                    //}
                 }
                 foreach (Face face in involvedFaces)
                 {
@@ -1099,7 +1099,6 @@ public bool Apply()
                     clonedShell.RecalcVertices(); // not sure, why this is necessary, but sometimes it is 
                     return clonedShell.CheckConsistency();
                 }
-                return true;
             }
             finally
             {   // clear all sets to allow multiple usage of the parametrics

CADability/ParametricProperty.cs

@@ -615,7 +615,6 @@ public override ParametricProperty Clone(Dictionary<Face, Face> clonedFaces, Dic
             List<Face> forwardFacesCloned = new List<Face>();
             List<Face> backwardFacesCloned = new List<Face>();
             List<object> affectedObjectsCloned = new List<object>();
-            object fromHereCloned, toHereCloned;
             for (int i = 0; i < forwardFaces.Count; i++)
             {
                 if (clonedFaces.TryGetValue(forwardFaces[i], out Face clone)) forwardFacesCloned.Add(clone);