diff --git a/src/DotRecast.Core/FRand.cs b/src/DotRecast.Core/FRand.cs
new file mode 100644
index 0000000..a75f4ee
--- /dev/null
+++ b/src/DotRecast.Core/FRand.cs
@@ -0,0 +1,24 @@
+using System;
+
+namespace DotRecast.Core
+{
+    public class FRand
+    {
+        private readonly Random r;
+
+        public FRand()
+        {
+            r = new Random();
+        }
+
+        public FRand(long seed)
+        {
+            r = new Random((int)seed); // TODO : 랜덤 시드 확인 필요
+        }
+
+        public float frand()
+        {
+            return (float)r.NextDouble();
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/DotRecast.Detour/NavMeshQuery.cs b/src/DotRecast.Detour/NavMeshQuery.cs
index 1aae52e..518aeb3 100644
--- a/src/DotRecast.Detour/NavMeshQuery.cs
+++ b/src/DotRecast.Detour/NavMeshQuery.cs
@@ -73,26 +73,6 @@ namespace DotRecast.Detour
             m_openList = new NodeQueue();
         }
 
-        public class FRand
-        {
-            private readonly Random r;
-
-            public FRand()
-            {
-                r = new Random();
-            }
-
-            public FRand(long seed)
-            {
-                r = new Random((int)seed); // TODO : 랜덤 시드 확인 필요
-            }
-
-            public float frand()
-            {
-                return (float)r.NextDouble();
-            }
-        }
-
         /**
      * Returns random location on navmesh. Polygons are chosen weighted by area. The search runs in linear related to
      * number of polygon.
diff --git a/src/DotRecast.Recast.Demo/Tools/CrowdProfilingTool.cs b/src/DotRecast.Recast.Demo/Tools/CrowdProfilingTool.cs
index 45b3016..33694d6 100644
--- a/src/DotRecast.Recast.Demo/Tools/CrowdProfilingTool.cs
+++ b/src/DotRecast.Recast.Demo/Tools/CrowdProfilingTool.cs
@@ -48,7 +48,7 @@ public class CrowdProfilingTool
     private Crowd crowd;
     private NavMesh navMesh;
     private CrowdConfig config;
-    private NavMeshQuery.FRand rnd;
+    private FRand rnd;
     private readonly List<FindRandomPointResult> zones = new();
     private long crowdUpdateTime;
 
@@ -79,7 +79,7 @@ public class CrowdProfilingTool
         {
             if (navMesh != null)
             {
-                rnd = new NavMeshQuery.FRand(randomSeed);
+                rnd = new FRand(randomSeed);
                 createCrowd();
                 createZones();
                 NavMeshQuery navquery = new NavMeshQuery(navMesh);
diff --git a/src/DotRecast.Recast.Demo/Tools/TestNavmeshTool.cs b/src/DotRecast.Recast.Demo/Tools/TestNavmeshTool.cs
index f18cb2f..0587bb0 100644
--- a/src/DotRecast.Recast.Demo/Tools/TestNavmeshTool.cs
+++ b/src/DotRecast.Recast.Demo/Tools/TestNavmeshTool.cs
@@ -495,7 +495,7 @@ public class TestNavmeshTool : Tool
                 for (int i = 0; i < 200; i++)
                 {
                     Result<FindRandomPointResult> result = m_navQuery.findRandomPointAroundCircle(m_startRef, m_spos, dist,
-                        m_filter, new NavMeshQuery.FRand(), constraint);
+                        m_filter, new FRand(), constraint);
                     if (result.succeeded())
                     {
                         randomPoints.Add(result.result.getRandomPt());
diff --git a/test/DotRecast.Detour.Test/RandomPointTest.cs b/test/DotRecast.Detour.Test/RandomPointTest.cs
index a09cb24..e7aa59e 100644
--- a/test/DotRecast.Detour.Test/RandomPointTest.cs
+++ b/test/DotRecast.Detour.Test/RandomPointTest.cs
@@ -31,7 +31,7 @@ public class RandomPointTest : AbstractDetourTest
     [Test]
     public void testRandom()
     {
-        NavMeshQuery.FRand f = new NavMeshQuery.FRand(1);
+        FRand f = new FRand(1);
         QueryFilter filter = new DefaultQueryFilter();
         for (int i = 0; i < 1000; i++)
         {
@@ -59,7 +59,7 @@ public class RandomPointTest : AbstractDetourTest
     [Test]
     public void testRandomAroundCircle()
     {
-        NavMeshQuery.FRand f = new NavMeshQuery.FRand(1);
+        FRand f = new FRand(1);
         QueryFilter filter = new DefaultQueryFilter();
         FindRandomPointResult point = query.findRandomPoint(filter, f).result;
         for (int i = 0; i < 1000; i++)
@@ -90,7 +90,7 @@ public class RandomPointTest : AbstractDetourTest
     [Test]
     public void testRandomWithinCircle()
     {
-        NavMeshQuery.FRand f = new NavMeshQuery.FRand(1);
+        FRand f = new FRand(1);
         QueryFilter filter = new DefaultQueryFilter();
         FindRandomPointResult point = query.findRandomPoint(filter, f).result;
         float radius = 5f;
@@ -108,7 +108,7 @@ public class RandomPointTest : AbstractDetourTest
     [Test]
     public void testPerformance()
     {
-        NavMeshQuery.FRand f = new NavMeshQuery.FRand(1);
+        FRand f = new FRand(1);
         QueryFilter filter = new DefaultQueryFilter();
         FindRandomPointResult point = query.findRandomPoint(filter, f).result;
         float radius = 5f;