- add GenericMethodCaller

LightweightIocContainer/Exceptions/GenericMethodNotFoundException.cs

@@ -0,0 +1,17 @@
+// Author: Simon Gockner
+// Created: 2020-09-18
+// Copyright(c) 2020 SimonG. All Rights Reserved.
+
+using System;
+
+namespace LightweightIocContainer.Exceptions
+{
+    public class GenericMethodNotFoundException : Exception
+    {
+        public GenericMethodNotFoundException(string functionName)
+            : base($"Could not find function {functionName}")
+        {
+            
+        }
+    }
+}

LightweightIocContainer/GenericMethodCaller.cs

@@ -0,0 +1,31 @@
+// Author: Simon Gockner
+// Created: 2020-09-18
+// Copyright(c) 2020 SimonG. All Rights Reserved.
+
+using System;
+using System.Reflection;
+using LightweightIocContainer.Exceptions;
+
+namespace LightweightIocContainer
+{
+    public static class GenericMethodCaller
+    {
+        public static object Call(object caller, string functionName, Type genericParameter, BindingFlags bindingFlags, params object[] parameters)
+        {
+            MethodInfo method = caller.GetType().GetMethod(functionName, bindingFlags);
+            MethodInfo genericMethod = method?.MakeGenericMethod(genericParameter);
+
+            if (genericMethod == null)
+                throw new GenericMethodNotFoundException(functionName);
+
+            try //exceptions thrown by methods called with invoke are wrapped into another exception, the exception thrown by the invoked method can be returned by `Exception.GetBaseException()`
+            {
+                return genericMethod.Invoke(caller, parameters);
+            }
+            catch (Exception ex)
+            {
+                throw ex.GetBaseException();
+            }
+        }
+    }
+}