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POCreate Instance from assembly and its dependencies in C#
 

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  1. POCreate Instance from assembly and its dependencies in C#
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    <p>I have an app (let's just call it MyApp) that dynamically creates source code for a class and then compiles it. When it compiles the source code I also reference another DLL (that is the base class for this newly created class) that already exists in another folder. I do the following to compile and output the DLL:</p> <pre><code>//Create a C# code provider CodeDomProvider provider = CodeDomProvider.CreateProvider("CSharp"); //Set the complier parameters CompilerParameters cp = new CompilerParameters(); cp.GenerateExecutable = false; cp.GenerateInMemory = false; cp.TreatWarningsAsErrors = false; cp.WarningLevel = 3; cp.OutputAssembly = "SomeOutputPathForDLL"; // Include referenced assemblies cp.ReferencedAssemblies.Add("mscorlib.dll"); cp.ReferencedAssemblies.Add("System.dll"); cp.ReferencedAssemblies.Add("System.Core.dll"); cp.ReferencedAssemblies.Add("System.Data.dll"); cp.ReferencedAssemblies.Add("System.Data.DataSetExtensions.dll"); cp.ReferencedAssemblies.Add("System.Xml.dll"); cp.ReferencedAssemblies.Add("System.Xml.Linq.dll"); cp.ReferencedAssemblies.Add("MyApp.exe"); cp.ReferencedAssemblies.Add("SomeFolder\SomeAdditionalReferencedDLL.dll"); // Set the compiler options cp.CompilerOptions = "/target:library /optimize"; CompilerResults cr = provider.CompileAssemblyFromFile(cp, "PathToSourceCodeFile"); </code></pre> <p>Later on in my app (or next time the app runs) I try to create an instance of the class. I know where both the DLL for the newly created class (let's call it Blah) and the base class is. I use the following code to try to create an instance of the new class:</p> <pre><code>Assembly assembly = Assembly.LoadFile("PathToNewClassDLL"); Blah newBlah = assembly.CreateInstance("MyApp.BlahNamespace.Blah") as Blah; </code></pre> <p>When I call Assembly.CreateInstance like I do above I get an error saying it cannot create the instance. When I check assembly.GetReferencedAssemblies() it has the standard references and the reference for my app (MyApp.exe) but it doesn't have the reference for the dependent base class that I used when compiling the class originally (SomeAdditionalReferencedDLL.dll).</p> <p>I know that I have to add the base class reference somehow in order to create the instance but I am not sure how to do this. How do I create an instance of a class from an assembly when I have the assembly and all of it dependecies?</p> <p>Thanks</p>
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    1. COJust curious but did you try and load your dependancy first into your app domain then load the custom generated one?
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