Progress on adding GL shader system.

src/SlatedGameToolkit.Framework/Exceptions/OpenGLException.cs

@@ -0,0 +1,17 @@
+using System;
+
+namespace SlatedGameToolkit.Framework.Exceptions
+{
+    public class OpenGLException : Exception {
+        public OpenGLException() : base() {
+
+        }
+
+        public OpenGLException(string message) : base(message) {
+
+        }
+        
+        public OpenGLException(string message, Exception inner) : base(message, inner) {
+        }
+    }
+}