Can C# Code Fragments Be Dynamically Executed from a Text File, and Should They Be Compiled for Optimal Performance?

Dynamic execution of the text file C# code fragment

Question:

Can the C# code fragment be stored in the text file and dynamically execute it? In order to obtain the best performance, should I compile the code first?

Answer:

Yes, you can dynamically compile and execute the C# code fragment. For static .NET language like C#, the best way is to use Codedom (code document object model). CODEDOM can dynamically build and execute code fragments.

Use CSHARPCODEPROVIDER to compile:

CSHARPCODEPROVIDER provides an interface to compile the C# code. Examples as follows:

From text compilation code:

To compile the code from the text, please use Compileassemblyfromsource:

<code class="language-csharp">using System.CodeDom.Compiler;
using Microsoft.CSharp;

var csc = new CSharpCodeProvider(new Dictionary<string, string>() { { "CompilerVersion", "v3.5" } });</code>

Execute the compiled code (use reflection):

After the compilation is completed, use reflection to dynamically load and execute the assembly:

<code class="language-csharp">var parameters = new CompilerParameters(new[] { "mscorlib.dll", "System.Core.dll" }, "foo.exe", true);
parameters.GenerateExecutable = true;
CompilerResults results = csc.CompileAssemblyFromSource(parameters, codeText);</code>

The advantage of this method is that the performance has been improved because the code has been compiled before execution.

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