Added some C# files (made from C ones)

csharp/hello_v0.cs

@@ -0,0 +1,9 @@
+using System;
+namespace Foo{
+    public class Bar{
+        public static int Main() {
+                int i;
+                return 0;
+        }
+    }
+}

csharp/hello_v1.cs

@@ -0,0 +1,8 @@
+using System;
+namespace Foo{
+    public class Bar{
+        public static int Main() {
+                return 0;
+        }
+    }
+}

csharp/patch_v0.cs

@@ -0,0 +1,13 @@
+using System;
+namespace Foo{
+    public class Bar{
+        public static int Main() {
+            int a = 0;
+            int b = 0;
+            if (a > b)
+                return 1;
+            else
+                return 0;
+        }
+    }
+}

csharp/patch_v1.cs

@@ -0,0 +1,13 @@
+using System;
+namespace Foo{
+    public class Bar{
+        public static int Main() {
+            int a = 0;
+            int b = 0;
+            if (a < b)
+                return 1;
+            else
+                return 0;
+        }
+    }
+}

csharp/saner_v0.cs

@@ -0,0 +1,11 @@
+using System;
+namespace Foo{
+    public class Bar{
+        public static void Main() {
+            int y=0, x=1;
+            x = 37;
+            if (y==0)
+                x = 0;
+        }
+    }
+}

csharp/saner_v1.cs

@@ -0,0 +1,12 @@
+using System;
+namespace Foo{
+    public class Bar{
+        public static void Main() {
+            int y=0, x=1;
+            if (y==0)
+                x = 0;
+            else
+                x = 37;
+        }
+    }
+}