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<sources> Element

Specifies trace sources that initiate tracing messages.

<configuration> Element
  <system.diagnostics> Element
    <sources> Element
<sources>
   <source>...</source>
</sources>

The following sections describe attributes, child elements, and parent elements.

Attributes

None.

Child Elements

Element

Description

<source> Element

Required element.

Specifies a trace source that initiates tracing messages.

Parent Elements

Element

Description

configuration

The root element in every configuration file used by the common language runtime and .NET Framework applications.

system.diagnostics

Specifies trace listeners that collect, store, and route messages and the level where a trace switch is set.

This element can be used in the machine configuration file (Machine.config) and the application configuration file.

The following example shows how to use the <sources> element to add the trace source mySource and to set the level for the source switch named sourceSwitch. A console trace listener is added that writes trace information to the console.

<configuration>
   <system.diagnostics>
      <sources>
         <source name="mySource" switchName="sourceSwitch" 
            switchType="System.Diagnostics.SourceSwitch"  >
            <listeners>
               <add name="console" 
                  type="System.Diagnostics.ConsoleTraceListener" >
                  <filter type="System.Diagnostics.EventTypeFilter" 
                     initializeData="Error" />
               </add>
               <remove name="Default" />
            </listeners>
         </source>
      </sources>
      <switches>
         <add name="sourceSwitch" value="Warning" />
      </switches>  
   </system.diagnostics> 
</configuration>
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