diff --git a/contents/approximate_counting/approximate_counting.md b/contents/approximate_counting/approximate_counting.md
index 917e79922..b99f5455b 100644
--- a/contents/approximate_counting/approximate_counting.md
+++ b/contents/approximate_counting/approximate_counting.md
@@ -362,6 +362,8 @@ As we do not have any objects to count, we will instead simulate the counting wi
[import, lang:"julia"](code/julia/approximate_counting.jl)
{% sample lang="cpp" %}
[import, lang:"cpp"](code/c++/approximate_counting.cpp)
+{% sample lang="cs" %}
+[import, lang:"csharp"](code/csharp/ApproximateCounting.cs)
{% endmethod %}
### Bibliography
diff --git a/contents/approximate_counting/code/csharp/ApproximateCounting.cs b/contents/approximate_counting/code/csharp/ApproximateCounting.cs
new file mode 100644
index 000000000..d8df57c00
--- /dev/null
+++ b/contents/approximate_counting/code/csharp/ApproximateCounting.cs
@@ -0,0 +1,73 @@
+using System;
+
+namespace ApproximateCounting
+{
+ class ApproximateCounting
+ {
+ static readonly Random Rng = new();
+
+ /// value in register
+ /// scaling value for the logarithm based on Morris's paper
+ /// N(v,a) the approximate count for the given values
+ static double N(int v, double a)
+ {
+ return a * Math.Pow(1 + 1 / a, v - 1);
+ }
+
+ /// value in register
+ /// scaling value for the logarithm based on Morris's paper
+ /// Returns the new value for v
+ static int Increment(int v, double a)
+ {
+ var delta = 1 / (N(v + 1, a) - N(v, a));
+
+ if (Rng.NextDouble() <= delta)
+ return v + 1;
+ else
+ return v;
+ }
+
+ ///
+ /// This function simulates approximate counting
+ ///
+ /// number of items to count and loop over
+ /// a scaling value for the logarithm based on Morris's paper
+ /// It returns n(v,a), the approximate count
+ static double ApproximateCount(int noItems, double a)
+ {
+ var v = 0;
+ for (var i = 0; i < noItems; i++)
+ {
+ v = Increment(v, a);
+ }
+
+ return N(v, a);
+ }
+
+ /// the number of counting trials
+ /// the number of items to count to
+ /// a scaling value for the logarithm based on Morris's paper
+ /// the maximum percent error allowed
+ /// "passed" or "failed" depending on the test result
+ static string TextApproximateCount(int noTrials, int noItems, double a, double threshold)
+ {
+ var sum = 0.0;
+ for (var i = 0; i < noTrials; i++)
+ sum += ApproximateCount(noItems, a);
+
+ var avg = sum / noTrials;
+
+ return Math.Abs((avg - noItems) / noItems) < threshold ? "passed" : "failed";
+ }
+
+ static void Main()
+ {
+ Console.WriteLine("[#]\nCounting Tests, 100 trials");
+ Console.WriteLine($"[#]\nTesting 1,000, a = 30, 1% error : {TextApproximateCount(100, 1_000, 30, 0.1)}");
+ Console.WriteLine($"[#]\nTesting 12,345, a = 10, 10% error : {TextApproximateCount(100, 12_345, 10, 0.1)}");
+ Console.WriteLine(
+ $"[#]\nTesting 222,222, a = 0.5, 20% error : {TextApproximateCount(100, 222_222, 0.5, 0.2)}");
+ }
+ }
+}
+