It looks like you edited your .csproj files manually, instead of using the GUI. Unlike Visual Studio, Blend reads the platform and configuration from each project file, not from the solution file. Your project files probably start as follows:
<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<PropertyGroup>
<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
This is the standard configuration for the project and what Blend reads. Modify each .csproj to specify Release and x86 as the default configuration, and Blend should respect it.
From what I see, there is no way to specify this configuration in Blend - it always selects the default value.
source
share