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    <p>There are two ways to pass parameters in Autofac:</p> <p><strong><a href="http://docs.autofac.org/en/latest/register/parameters.html" rel="nofollow noreferrer">When you are registering the component</a>:</strong></p> <p>When you register components, you have the ability to provide a set of parameters that can be used during the resolution of services based on that component. Autofac offers several different parameter matching strategies:</p> <ul> <li><code>NamedParameter</code> - match target parameters by name </li> <li><code>TypedParameter</code> - match target parameters by type (exact type match required)</li> <li><p><code>ResolvedParameter</code> - flexible parameter matching</p> <pre><code>// Using a NAMED parameter: builder.RegisterType&lt;ConfigReader&gt;() .As&lt;IConfigReader&gt;() .WithParameter("configSectionName", "sectionName");// parameter name, parameter value. It's the same of this: new NamedParameter("configSectionName", "sectionName") // Using a TYPED parameter: builder.RegisterType&lt;ConfigReader&gt;() .As&lt;IConfigReader&gt;() .WithParameter(new TypedParameter(typeof(string), "sectionName")); // Using a RESOLVED parameter: builder.RegisterType&lt;ConfigReader&gt;() .As&lt;IConfigReader&gt;() .WithParameter( new ResolvedParameter( (pi, ctx) =&gt; pi.ParameterType == typeof(string) &amp;&amp; pi.Name == "configSectionName", (pi, ctx) =&gt; "sectionName")); </code></pre> <p><code>NamedParameter</code> and <code>TypedParameter</code> can supply constant values only.</p> <p><code>ResolvedParameter</code> can be used as a way to supply values dynamically retrieved from the container, e.g. by resolving a service by name.</p></li> </ul> <p>In case you want to pass as parameter a service that is already registered, eg, <code>IConfiguration</code>, you can resolve the parameter as I show below:</p> <pre><code> builder.RegisterType&lt;Service&gt;() .As&lt;Iervice&gt;() .WithParameter((pi, ctx) =&gt; pi.ParameterType == typeof(IConfiguration) &amp;&amp; pi.Name == "configuration", (pi, ctx) =&gt; ctx.Resolve&lt;IConfiguration&gt;()); </code></pre> <p><strong><a href="http://docs.autofac.org/en/latest/resolve/parameters.html" rel="nofollow noreferrer">When you are resolving the component</a>:</strong></p> <p>One way to pass parameter at runtime in Autofac is using the <code>Resolve</code> method. You could create a class like this:</p> <pre><code>public class ContainerManager { public IContainer Container {get;set;} //... public T[] ResolveAllWithParameters&lt;T&gt;(IEnumerable&lt;Parameter&gt; parameters) { return Container.Resolve&lt;IEnumerable&lt;T&gt;&gt;(parameters).ToArray(); } } </code></pre> <p><code>Parameter</code> is an abstract class that belongs to Autofac, you can use the <code>NamedParameter</code> class to pass the parameters that you need. You can use the <code>ContainerManager</code> class as I show below:</p> <pre><code> public T[] ResolveAllWithParameters&lt;T&gt;(IDictionary&lt;string,object&gt; parameters ) { var _parameters=new List&lt;Parameter&gt;(); foreach (var parameter in parameters) { _parameters.Add( new NamedParameter(parameter.Key, parameter.Value)); } return ContainerManager.ResolveAllWithParameters&lt;T&gt;(_parameters); } </code></pre> <p>This way you can pass the parameters at runtime using a <code>Dictionary&lt;string, object&gt;</code> when you are resolving an specific component.</p> <p>Using an <a href="https://msdn.microsoft.com/en-us/library/bb383977.aspx" rel="nofollow noreferrer">Extension Method</a> could be even more simple:</p> <pre><code>public static class ContainerExtensions { public static T[] ResolveAllWithParameters&lt;T&gt;(this IContainer Container, IDictionary&lt;string, object&gt; parameters) { var _parameters = new List&lt;Parameter&gt;(); foreach (var parameter in parameters) { _parameters.Add(new NamedParameter(parameter.Key, parameter.Value)); } return Container.Resolve&lt;IEnumerable&lt;T&gt;&gt;(_parameters).ToArray(); } } </code></pre>
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