Activators Dotnet 4.6.1 [2026 Release]

var paramExpr = Expression.Parameter(typeof(object[]), "args"); var argExprs = ctor.GetParameters().Select((p, i) => Expression.Convert(Expression.ArrayIndex(paramExpr, Expression.Constant(i)), p.ParameterType)); var newExpr = Expression.New(ctor, argExprs); var lambda = Expression.Lambda<Func<object[], object>>(newExpr, paramExpr); return lambda.Compile();

public T CreateNew () where T : new () return Activator.CreateInstance (); Use code with caution. Copied to clipboard activators dotnet 4.6.1

If you are upgrading your environment, modern versions of .NET (Core and 5+) offer more efficient ways to handle dynamic activation, such as: var paramExpr = Expression

If your assembly is not loaded yet:

In .NET Framework 4.6.1, System.Activator remains a fundamental tool for runtime type instantiation. While it incurs a performance penalty due to reflection, its simplicity and flexibility make it ideal for plugin architectures, IoC containers, and late-binding scenarios. For new development targeting modern .NET (Core 3.1+ or .NET 5/6/8), consider ActivatorUtilities for DI integration, but for maintaining legacy .NET 4.6.1 applications, understanding Activator is essential. For new development targeting modern