What can i do to fix it?
Comments: ** Comment from web user: Delta0555 **
Found another solution!
Open your service .csproj File in a text editor, and look out for the <content> tags.
The ones that won't open up in the Designer will look like this:
```
<Content Include="MyDataContract.datacontract.diagram">
<SubType>Designer</SubType>
<DependentUpon>MyDataContract.datacontract</DependentUpon>
</Content>
```
The cuplrit in my project was
```
<SubType>Designer</SubType>
```
Just change it to:
```
<Content Include="MyDataContract.datacontract.diagram">
<SubType>Content</SubType>
<DependentUpon>MyDataContract.datacontract</DependentUpon>
</Content>
```
And presto, you have your designer view back! Works also if you cannot open your servicecontract in the designer view.