Move solution and projects to src

src/Ryujinx.Horizon.Common/InvalidResultException.cs

@@ -0,0 +1,23 @@
+using System;
+
+namespace Ryujinx.Horizon.Common
+{
+    public class InvalidResultException : Exception
+    {
+        public InvalidResultException()
+        {
+        }
+
+        public InvalidResultException(Result result) : base($"Unexpected result code {result} returned.")
+        {
+        }
+
+        public InvalidResultException(string message) : base(message)
+        {
+        }
+
+        public InvalidResultException(string message, Exception innerException) : base(message, innerException)
+        {
+        }
+    }
+}