title: Convert Merge join into BIML - need NumKeyColumns changed to 1
body: <p>I was almost ready with a BIML file but I have one more problem </p>
  
  <p>I was trying to put the standard Merge Join into biml
  and 99% works, and the component is generated and the dtsx is made but
  I can not set the numKeyColumns value anywhere</p>
  
  <pre><code> &lt;properties&gt;
              &lt;property dataType="System.Int32" description="Specifies the type of join to perform." name="JoinType" typeConverter="JoinType"&gt;0&lt;/property&gt;
              &lt;property dataType="System.Int32" description="Specifies the number of columns in the ordering key." name="NumKeyColumns"&gt;0&lt;/property&gt;
              &lt;property dataType="System.Boolean" description="Indicates whether the null values are treated as equal values." name="TreatNullsAsEqual"&gt;true&lt;/property&gt;
              &lt;property dataType="System.Int32" description="Indicates the requested maximum buffers per input before blocking." name="MaxBuffersPerInput"&gt;5&lt;/property&gt;
            &lt;/properties&gt;
  </code></pre>
  
  <p>I could set the jointype
  But I can not find the NumKeyColumns
  when the dtsx is generated it will fill in 0
  but is has to be 1</p>
  
  <p>This is the merge join in biml (without the incoming connections)</p>
  
  <pre><code>            &lt;MergeJoin Name="Merge Join" JoinType="FullOuterJoin"&gt;
            &lt;LeftInputPath OutputPathName="Source.Output"&gt;
              &lt;Columns&gt;
                &lt;Column SourceColumn="BK" IsUsed="true" SortKeyPosition="1" TargetColumn="sBK" /&gt;
                &lt;Column SourceColumn="hbSource" IsUsed="true" /&gt;
              &lt;/Columns&gt;
            &lt;/LeftInputPath&gt;
            &lt;RightInputPath OutputPathName="Dwh Destination.Output"&gt;
              &lt;Columns&gt;
                &lt;Column SourceColumn="BK" IsUsed="true" TargetColumn="dBK" /&gt;
                &lt;Column SourceColumn="hbDestination" IsUsed="true" /&gt;
              &lt;/Columns&gt;
            &lt;/RightInputPath&gt; 
          &lt;/MergeJoin&gt;
  </code></pre>
  
  <p>Any help is greatly appreciated</p>