diff --git a/rhinocommon/cs/SampleCsCommands/SampleCsAddNurbsCircle.cs b/rhinocommon/cs/SampleCsCommands/SampleCsAddNurbsCircle.cs
index 24ce70b5..bc1c0b8c 100644
--- a/rhinocommon/cs/SampleCsCommands/SampleCsAddNurbsCircle.cs
+++ b/rhinocommon/cs/SampleCsCommands/SampleCsAddNurbsCircle.cs
@@ -39,6 +39,10 @@ protected override Result RunCommand(RhinoDoc doc, RunMode mode)
  
       if (curve.IsValid)
       {
+        var length = curve.GetLength();
+        var domain = new Interval(0.0, length);
+        curve.Domain = domain;
+
         doc.Objects.AddCurve(curve);
         doc.Views.Redraw();
       } 
diff --git a/rhinocommon/cs/SampleCsCommands/SampleCsAddNurbsCurve.cs b/rhinocommon/cs/SampleCsCommands/SampleCsAddNurbsCurve.cs
index 091a8647..1d420d7b 100644
--- a/rhinocommon/cs/SampleCsCommands/SampleCsAddNurbsCurve.cs
+++ b/rhinocommon/cs/SampleCsCommands/SampleCsAddNurbsCurve.cs
@@ -61,6 +61,11 @@ protected override Result RunCommand(RhinoDoc doc, RunMode mode)
 
       if (curve.IsValid)
       {
+        // Parameterization should match the length of a curve
+        var length = curve.GetLength();
+        var domain = new Interval(0.0, length);
+        curve.Domain = domain;
+
         doc.Objects.AddCurve(curve);
         doc.Views.Redraw();
       } 
diff --git a/rhinocommon/cs/SampleCsCommands/SampleCsNurbsCircle.cs b/rhinocommon/cs/SampleCsCommands/SampleCsNurbsCircle.cs
index b8d9561f..d891188d 100644
--- a/rhinocommon/cs/SampleCsCommands/SampleCsNurbsCircle.cs
+++ b/rhinocommon/cs/SampleCsCommands/SampleCsNurbsCircle.cs
@@ -78,6 +78,11 @@ protected override Result RunCommand(RhinoDoc doc, RunMode mode)
 
       if (curve.IsValid)
       {
+        // Parameterization should match the length of a curve
+        var length = curve.GetLength();
+        var domain = new Interval(0.0, length);
+        curve.Domain = domain;
+
         doc.Objects.AddCurve(curve);
         doc.Views.Redraw();
       }