diff --git a/inf3.csproj b/inf3.csproj
index 53d5c28..07c6a7a 100644
--- a/inf3.csproj
+++ b/inf3.csproj
@@ -113,6 +113,7 @@
     <Compile Include="src\Gui\Splashscreen.cs">
       <SubType>Form</SubType>
     </Compile>
+    <Compile Include="src\BinarySearch.cs" />
     <Compile Include="Sorttest.cs" />
   </ItemGroup>
   <ItemGroup>
diff --git a/src/BinarySearch.cs b/src/BinarySearch.cs
new file mode 100644
index 0000000..004ff78
--- /dev/null
+++ b/src/BinarySearch.cs
@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+
+namespace WorldOfPeacecraft
+{
+	public class BinarySearch<T>
+	{
+		public static int search (T searchedElement, IList<T> list, Func<T, T, bool> isSmaller)
+		{
+			int start = 0;
+			int end = list.Count - 1;
+			int current;
+			do {
+				current = start + (end - start) / 2;
+				if (isSmaller(list[current], searchedElement)) {
+					start = current;
+				}
+				else if (isSmaller(searchedElement, list[current])) {
+					end = current;
+				}
+				else {
+					return current;
+				}
+			} while (end - start > 0);
+			return -1;
+		}
+	}
+}
\ No newline at end of file