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Add and Remove Assembly

using System; using System.Collections.Generic; using System.Text; using System.Reflection; using System.ComponentModel; using System.Globalization; namespace SPaDevToolkit.StsAdm.Commands.Utilities {     internal static class Gac     {         public static void AddAssembly(string assemblyPath)         {             string mscorcfgStrongName = string.Format(CultureInfo.InvariantCulture, "mscorcfg,Version={0}, Culture={1}, PublicKeyToken={2}", "2.0.0.0", "neutral", "b03f5f7f11d50a3a");             Assembly assembly = Assembly.Load(mscorcfgStrongName);             //Type name is not expected to be changed.             Type type = assembly.GetType("Microsoft.CLRAdmin.Fusion");             int result;             result = (int)Reflection.InvokeMember(type, "AddAssemblytoGac", BindingFlags.NonPublic | BindingFlags.Static | BindingFlags.InvokeMethod, new object[] { assemblyPath });             //If some error occurred              if (result != 0)             {                 throw new Exception(string.Format(CultureInfo.InvariantCulture, "Assembly could not be placed in GAC. Error code returned was {0}", result.ToString()));             }         }         public static void RemoveAssembly(string assemblyPath)         {             //Get assembly strong name details             string strongName = Assembly.LoadFrom(assemblyPath).FullName;             string[] strongNameParts = strongName.Split(new char[] { ',' });             string assemblyName = strongNameParts[0];             string version = strongNameParts[1].Split(new char[] { '=' })[1];             string publicKey = strongNameParts[3].Split(new char[] { '=' })[1];             string configFileStrongName = string.Format(CultureInfo.InvariantCulture, "mscorcfg,Version={0}, Culture={1}, PublicKeyToken={2}", "2.0.0.0", "neutral", "b03f5f7f11d50a3a");             Assembly assembly = Assembly.Load(configFileStrongName);             //Type name is not expected to be changed.             Type fusionType = assembly.GetType("Microsoft.CLRAdmin.Fusion");             //MethodInfo mi = fusionType.GetMethod("RemoveAssemblyFromGac", BindingFlags.NonPublic | BindingFlags.Static);             //Create variable of AssemInfo struct             Type assemblyInfoType = assembly.GetType("Microsoft.CLRAdmin.AssemInfo");             object assemInfo = Activator.CreateInstance(assemblyInfoType, true);             //Binding flags to filter/search out fields in the type             BindingFlags bindingFlags = BindingFlags.NonPublic | BindingFlags.DeclaredOnly | BindingFlags.Instance | BindingFlags.GetField;             //Set field values.             //Disassembler shows only following fields are used by RemoveAssemblyFromGac method.             //FieldInfo sName = assemblyInfoType.GetField("Name", bindingFlags);             //sName.SetValue(assemInfo, assemblyName);             Reflection.SetField(assemInfo, "Name", new object[] { assemblyName });             //FieldInfo sVersion = assemblyInfoType.GetField("Version", bindingFlags);             //sVersion.SetValue(assemInfo, version);             Reflection.SetField(assemInfo, "Version", new object[] { version });             //FieldInfo sPublicKeyToken = assemblyInfoType.GetField("PublicKeyToken", bindingFlags);             //sPublicKeyToken.SetValue(assemInfo, publicKey);             Reflection.SetField(assemInfo, "PublicKeyToken", new object[] { publicKey });             //FieldInfo sFusionName = assemblyInfoType.GetField("sFusionName", bindingFlags);             //sFusionName.SetValue(assemInfo, string.Format(CultureInfo.InvariantCulture, "{0}{1}", strongName, ", processorArchitecture=MSIL"));             Reflection.SetField(assemInfo, "sFusionName", new object[] { string.Format(CultureInfo.InvariantCulture, "{0}{1}", strongName, ", processorArchitecture=MSIL") });             //FieldInfo nCacheType = assemblyInfoType.GetField("nCacheType", bindingFlags);             //nCacheType.SetValue(assemInfo, (uint)2);             Reflection.SetField(assemInfo, "nCacheType", new object[] { (uint)2 });             bool result;             //result = (bool)mi.Invoke(null, new object[] { assemInfo });             result = (bool)Reflection.InvokeMember(fusionType, "RemoveAssemblyFromGac", BindingFlags.NonPublic | BindingFlags.Static | BindingFlags.InvokeMethod, new object[] { assemInfo });             //If some error occurred              if (!result)             {                 throw new Exception(string.Format(CultureInfo.InvariantCulture, "Assembly could not be uninstalled from GAC. Error code returned was {0}", result.ToString()));             }         }             internal static class Reflection     {         public static object InvokeMember(object src, string strName, BindingFlags type, object[] args)         {             bool bStatic = (src is Type);             Type t = bStatic ? (Type)src : src.GetType();             BindingFlags bindingFlags = BindingFlags.NonPublic | BindingFlags.Public |               BindingFlags.DeclaredOnly |               (bStatic ? BindingFlags.Static : BindingFlags.Instance) |               type;             object target = (bStatic ? null : src);             return (t.InvokeMember(strName, bindingFlags, null, target, args));         }         public static object GetProperty(object src, string strName)         {             return (InvokeMember(src, strName, BindingFlags.GetProperty, null));         }         public static object SetProperty(object src, string strName, object[] args)         {             return (InvokeMember(src, strName, BindingFlags.SetProperty, args));         }         public static object GetField(object src, string strName)         {             return (InvokeMember(src, strName, BindingFlags.GetField, null));         }         public static object SetField(object src, string strName, object[] args)         {             return (InvokeMember(src, strName, BindingFlags.SetField, args));         }     } }