Move solution and projects to src

src/Ryujinx.Memory/WindowsShared/WindowsApiException.cs

@@ -0,0 +1,24 @@
+using System;
+
+namespace Ryujinx.Memory.WindowsShared
+{
+    class WindowsApiException : Exception
+    {
+        public WindowsApiException()
+        {
+        }
+
+        public WindowsApiException(string functionName) : base(CreateMessage(functionName))
+        {
+        }
+
+        public WindowsApiException(string functionName, Exception inner) : base(CreateMessage(functionName), inner)
+        {
+        }
+
+        private static string CreateMessage(string functionName)
+        {
+            return $"{functionName} returned error code 0x{WindowsApi.GetLastError():X}.";
+        }
+    }
+}