diff --git a/csharp/Euler/include/utils.cs b/csharp/Euler/include/utils.cs
index b247d277..9fa64a47 100644
--- a/csharp/Euler/include/utils.cs
+++ b/csharp/Euler/include/utils.cs
@@ -1,4 +1,5 @@
 using System.IO;
+using System.Runtime.InteropServices;
 
 namespace Euler
 {
@@ -14,11 +15,15 @@ private static string GetDataPath(string name)
 
         public static string GetDataFileText(string name)
         {
+            if (RuntimeInformation.IsOSPlatform(OSPlatform.Create("WEBASSEMBLY")))
+                return WasmIOFallback.GetText(name);
             return File.ReadAllText(GetDataPath(name));
         }
 
         public static byte[] GetDataFileBytes(string name)
         {
+            if (RuntimeInformation.IsOSPlatform(OSPlatform.Create("WEBASSEMBLY")))
+                return WasmIOFallback.GetBytes(name);
             return File.ReadAllBytes(GetDataPath(name));
         }
 
diff --git a/csharp/Euler/include/wasm-fallback.cs b/csharp/Euler/include/wasm-fallback.cs
new file mode 100644
index 00000000..df25655b
--- /dev/null
+++ b/csharp/Euler/include/wasm-fallback.cs
@@ -0,0 +1,17 @@
+using System.IO;
+
+namespace Euler
+{
+    public static class WasmIOFallback
+    {
+        public static string GetText(string name)
+        {
+            return "";
+        }
+
+        public static byte[] GetBytes(string name)
+        {
+            return new byte[] {};
+        }
+    }
+}