diff --git a/.vs/funkylib/v15/.suo b/.vs/funkylib/v15/.suo
index ad83dc4..5f3d9a2 100644
Binary files a/.vs/funkylib/v15/.suo and b/.vs/funkylib/v15/.suo differ
diff --git a/Option.cs b/Option.cs
index 441ea86..32f8aad 100644
--- a/Option.cs
+++ b/Option.cs
@@ -90,16 +90,26 @@ public static Option<R> map<A, R>(this Option<A> @this, Func<A, R> func) {
                 () => Option.None, value => Option.Some(func(value)));
         }
 
-    public static Option<A> orElse<A>(this Option<A> @this, Func<Option<A>> optional) => !@this.isSome ? optional() : @this;
+     public static Option<C> orElse<A,B,C>(this Option<A> @this, Func<Option<B>> optional, Func<A,C> mapThis, Func<B,C> mapAnother) {
+      if (@this.isSome)
+        return mapThis(@this._unsafe);
+      else {
+        var another = optional();
+        if (another.isSome)
+          return mapAnother(another._unsafe);
+        else
+          return Option.None;
+      }
+    }
 
-      public static bool exist<A>(this Option<A> @this, Option<A> other) =>
+    public static bool exist<A>(this Option<A> @this, Option<A> other) =>
       @this.fold(
         () => false,
         left => other.fold(
           () => false,
           right => left.Equals(right)
-            )
-          );
+        )
+      );
 
         public static Option<R> flatMap<A, R>(this Option<A> @this, Func<A, Option<R>> func) {
             return @this.fold(
diff --git a/ValueTypes/Int.cs b/ValueTypes/Int.cs
new file mode 100644
index 0000000..0f85abf
--- /dev/null
+++ b/ValueTypes/Int.cs
@@ -0,0 +1,8 @@
+namespace funkylib.ValueTypes {
+  public static class Int {
+    public static Option<int> parse(string s) {
+      int temp;
+      return int.TryParse(s, out temp) ? temp.some() : Option.None;
+    }
+  }
+}
\ No newline at end of file
diff --git a/bin/Release/funkylib.dll b/bin/Release/funkylib.dll
index d7594bd..f25302a 100644
Binary files a/bin/Release/funkylib.dll and b/bin/Release/funkylib.dll differ
diff --git a/bin/Release/funkylib.pdb b/bin/Release/funkylib.pdb
index f0de505..6b03200 100644
Binary files a/bin/Release/funkylib.pdb and b/bin/Release/funkylib.pdb differ
diff --git a/bin/Release/nunit_random_seed.tmp b/bin/Release/nunit_random_seed.tmp
index 647eaae..e954d0e 100644
--- a/bin/Release/nunit_random_seed.tmp
+++ b/bin/Release/nunit_random_seed.tmp
@@ -1 +1 @@
-1253614604
\ No newline at end of file
+1629596981
\ No newline at end of file
diff --git a/funkylib.csproj b/funkylib.csproj
index 5972043..25072b7 100644
--- a/funkylib.csproj
+++ b/funkylib.csproj
@@ -58,6 +58,7 @@
     <Compile Include="Try.cs" />
     <Compile Include="Validation.cs" />
     <Compile Include="ValueTypes\Double.cs" />
+    <Compile Include="ValueTypes\Int.cs" />
   </ItemGroup>
   <ItemGroup>
     <None Include="packages.config" />
diff --git a/obj/Release/CoreCompileInputs.cache b/obj/Release/CoreCompileInputs.cache
index 31524e9..4973c89 100644
--- a/obj/Release/CoreCompileInputs.cache
+++ b/obj/Release/CoreCompileInputs.cache
@@ -1 +1 @@
-ba6ea9c893a17fe351c643ce2c126e5673414ff3
+f49cd14fa23015f92a2083595c46e8b0c09a9054
diff --git a/obj/Release/funkylib.dll b/obj/Release/funkylib.dll
index d7594bd..f25302a 100644
Binary files a/obj/Release/funkylib.dll and b/obj/Release/funkylib.dll differ
diff --git a/obj/Release/funkylib.pdb b/obj/Release/funkylib.pdb
index f0de505..6b03200 100644
Binary files a/obj/Release/funkylib.pdb and b/obj/Release/funkylib.pdb differ