diff --git a/87 3-D Plot/csharp/Plot.sln b/87 3-D Plot/csharp/Plot.sln
new file mode 100644
index 00000000..1402bc2a
--- /dev/null
+++ b/87 3-D Plot/csharp/Plot.sln	
@@ -0,0 +1,34 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+VisualStudioVersion = 15.0.26124.0
+MinimumVisualStudioVersion = 15.0.26124.0
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Plot", "Plot\Plot.csproj", "{8857AE83-F481-43B0-AA51-D78E1340BD93}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
+		Release|Any CPU = Release|Any CPU
+		Release|x64 = Release|x64
+		Release|x86 = Release|x86
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{8857AE83-F481-43B0-AA51-D78E1340BD93}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{8857AE83-F481-43B0-AA51-D78E1340BD93}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{8857AE83-F481-43B0-AA51-D78E1340BD93}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{8857AE83-F481-43B0-AA51-D78E1340BD93}.Debug|x64.Build.0 = Debug|Any CPU
+		{8857AE83-F481-43B0-AA51-D78E1340BD93}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{8857AE83-F481-43B0-AA51-D78E1340BD93}.Debug|x86.Build.0 = Debug|Any CPU
+		{8857AE83-F481-43B0-AA51-D78E1340BD93}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{8857AE83-F481-43B0-AA51-D78E1340BD93}.Release|Any CPU.Build.0 = Release|Any CPU
+		{8857AE83-F481-43B0-AA51-D78E1340BD93}.Release|x64.ActiveCfg = Release|Any CPU
+		{8857AE83-F481-43B0-AA51-D78E1340BD93}.Release|x64.Build.0 = Release|Any CPU
+		{8857AE83-F481-43B0-AA51-D78E1340BD93}.Release|x86.ActiveCfg = Release|Any CPU
+		{8857AE83-F481-43B0-AA51-D78E1340BD93}.Release|x86.Build.0 = Release|Any CPU
+	EndGlobalSection
+EndGlobal
diff --git a/87 3-D Plot/csharp/Plot/Function.cs b/87 3-D Plot/csharp/Plot/Function.cs
new file mode 100644
index 00000000..3a459d4e
--- /dev/null
+++ b/87 3-D Plot/csharp/Plot/Function.cs	
@@ -0,0 +1,39 @@
+using System;
+using System.Collections.Generic;
+
+namespace Plot
+{
+    internal static class Function
+    {
+        internal static IEnumerable<IEnumerable<int>> GetRows()
+        {
+            for (var x = -30f; x <= 30f; x += 1.5f)
+            {
+                yield return GetValues(x);
+            }
+        }
+
+        private static IEnumerable<int> GetValues(float x)
+        {
+            var zPrevious = 0;
+            var yLimit = 5 * (int)(Math.Sqrt(900 - x * x) / 5);
+
+            for (var y = yLimit; y >= -yLimit; y -= 5)
+            {
+                var z = GetValue(x, y);
+
+                if (z > zPrevious)
+                {
+                    zPrevious = z;
+                    yield return z;
+                }
+            }
+        }
+
+        private static int GetValue(float x, float y)
+        {
+            var r = (float)Math.Sqrt(x * x + y * y);
+            return (int)(25 + 30 * Math.Exp(-r * r / 100) - 0.7f * y);
+        }
+    }
+}
diff --git a/87 3-D Plot/csharp/Plot/Plot.csproj b/87 3-D Plot/csharp/Plot/Plot.csproj
new file mode 100644
index 00000000..20827042
--- /dev/null
+++ b/87 3-D Plot/csharp/Plot/Plot.csproj	
@@ -0,0 +1,8 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net5.0</TargetFramework>
+  </PropertyGroup>
+
+</Project>
diff --git a/87 3-D Plot/csharp/Plot/Program.cs b/87 3-D Plot/csharp/Plot/Program.cs
new file mode 100644
index 00000000..132c41ef
--- /dev/null
+++ b/87 3-D Plot/csharp/Plot/Program.cs	
@@ -0,0 +1,38 @@
+using System;
+
+namespace Plot
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            PrintTitle();
+
+            foreach (var row in Function.GetRows())
+            {
+                foreach (var z in row)
+                {
+                    Plot(z);
+                }
+                Console.WriteLine();
+            }
+        }
+
+        private static void PrintTitle()
+        {
+            Console.WriteLine("                                3D Plot");
+            Console.WriteLine("               Creative Computing  Morristown, New Jersey");
+            Console.WriteLine();
+            Console.WriteLine();
+            Console.WriteLine();
+            Console.WriteLine();
+        }
+
+        private static void Plot(int z)
+        {
+            var x = Console.GetCursorPosition().Top;
+            Console.SetCursorPosition(z, x);
+            Console.Write("*");
+        }
+    }
+}