{"id":652,"date":"2014-02-21T04:24:38","date_gmt":"2014-02-21T04:24:38","guid":{"rendered":"http:\/\/elbsolutions.com\/projects\/?p=652"},"modified":"2022-02-03T11:25:02","modified_gmt":"2022-02-03T17:25:02","slug":"mixing-different-versions-net-4-5-app-referencing-3-5-dlls","status":"publish","type":"post","link":"https:\/\/elbsolutions.com\/projects\/mixing-different-versions-net-4-5-app-referencing-3-5-dlls\/","title":{"rendered":"Mixing different versions of .net &#8211; 4.5 (CLR4) app referencing 3.5 dlls (CLR2)"},"content":{"rendered":"<p>Some articles as i collect them are:<\/p>\n<ul>\n<li><a href=\"http:\/\/stackoverflow.com\/questions\/15549011\/project-reference-work-around-net-4-5-and-net-3-5\" target=\"_blank\" rel=\"noopener noreferrer\">Actually referencing and making diff. levels work together<\/a>\n<ul>\n<li><a href=\"http:\/\/stackoverflow.com\/questions\/2455654\/what-additional-configuration-is-necessary-to-reference-a-net-2-0-mixed-mode?rq=1\" target=\"_blank\" rel=\"noopener noreferrer\">same recommendation as the link above <\/a>(w. 433 upvotes) &#8211; useLegacyV2RuntimeActivationPolicy<\/li>\n<li><a href=\"http:\/\/stackoverflow.com\/questions\/3491279\/v2-0-50727-of-the-runtime-and-cannot-be-loaded-in-the-4-0-runtime-without-addi?lq=1\" target=\"_blank\" rel=\"noopener noreferrer\">and again <\/a>but with a little more if you scroll down (I see a pattern here)<\/li>\n<li>a few good links exist with <a href=\"http:\/\/stackoverflow.com\/questions\/1604663\/what-does-uselegacyv2runtimeactivationpolicy-do-in-the-net-4-config?lq=1\" target=\"_blank\" rel=\"noopener noreferrer\">this article <\/a>as to what\u00a0useLegacyV2RuntimeActivationPolicy does\n<ul>\n<li><a href=\"http:\/\/msdn.microsoft.com\/en-us\/library\/bbx34a2h%28VS.100%29.aspx\">msdn article <\/a>on\u00a0 &lt;startup useLegacyV2RuntimeActivationPolicy&#8230;&gt;<\/li>\n<li><a href=\"http:\/\/web.archive.org\/web\/20130128072944\/http:\/\/www.marklio.com\/marklio\/PermaLink,guid,ecc34c3c-be44-4422-86b7-900900e451f9.aspx\" target=\"_blank\" rel=\"noopener noreferrer\">why it was done<\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li><a href=\"http:\/\/www.hanselman.com\/blog\/NETVersioningAndMultiTargetingNET45IsAnInplaceUpgradeToNET40.aspx\" target=\"_blank\" rel=\"noopener noreferrer\">Background on CLR<\/a> (major release and side-by-side) vs. upgrade to a CLR (inplace upgrade)<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Some articles as i collect them are: Actually referencing and making diff. levels work together same recommendation as the link above (w. 433 upvotes) &#8211; useLegacyV2RuntimeActivationPolicy and again but with a little more if you scroll down (I see a pattern here) a few good links exist with this article as to what\u00a0useLegacyV2RuntimeActivationPolicy does msdn [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-652","post","type-post","status-publish","format-standard","hentry","category-general"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Mixing different versions of .net - 4.5 (CLR4) app referencing 3.5 dlls (CLR2) - ELB Solutions.com Inc.<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/elbsolutions.com\/projects\/mixing-different-versions-net-4-5-app-referencing-3-5-dlls\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Mixing different versions of .net - 4.5 (CLR4) app referencing 3.5 dlls (CLR2) - ELB Solutions.com Inc.\" \/>\n<meta property=\"og:description\" content=\"Some articles as i collect them are: Actually referencing and making diff. levels work together same recommendation as the link above (w. 433 upvotes) &#8211; useLegacyV2RuntimeActivationPolicy and again but with a little more if you scroll down (I see a pattern here) a few good links exist with this article as to what\u00a0useLegacyV2RuntimeActivationPolicy does msdn [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/elbsolutions.com\/projects\/mixing-different-versions-net-4-5-app-referencing-3-5-dlls\/\" \/>\n<meta property=\"og:site_name\" content=\"ELB Solutions.com Inc.\" \/>\n<meta property=\"article:published_time\" content=\"2014-02-21T04:24:38+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-02-03T17:25:02+00:00\" \/>\n<meta name=\"author\" content=\"Etienne Bley\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Etienne Bley\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/elbsolutions.com\\\/projects\\\/mixing-different-versions-net-4-5-app-referencing-3-5-dlls\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/elbsolutions.com\\\/projects\\\/mixing-different-versions-net-4-5-app-referencing-3-5-dlls\\\/\"},\"author\":{\"name\":\"Etienne Bley\",\"@id\":\"https:\\\/\\\/elbsolutions.com\\\/projects\\\/#\\\/schema\\\/person\\\/51e717c68f4f5917c63baf88f0896c39\"},\"headline\":\"Mixing different versions of .net &#8211; 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useLegacyV2RuntimeActivationPolicy and again but with a little more if you scroll down (I see a pattern here) a few good links exist with this article as to what\u00a0useLegacyV2RuntimeActivationPolicy does msdn [&hellip;]","og_url":"https:\/\/elbsolutions.com\/projects\/mixing-different-versions-net-4-5-app-referencing-3-5-dlls\/","og_site_name":"ELB Solutions.com Inc.","article_published_time":"2014-02-21T04:24:38+00:00","article_modified_time":"2022-02-03T17:25:02+00:00","author":"Etienne Bley","twitter_misc":{"Written by":"Etienne Bley"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/elbsolutions.com\/projects\/mixing-different-versions-net-4-5-app-referencing-3-5-dlls\/#article","isPartOf":{"@id":"https:\/\/elbsolutions.com\/projects\/mixing-different-versions-net-4-5-app-referencing-3-5-dlls\/"},"author":{"name":"Etienne Bley","@id":"https:\/\/elbsolutions.com\/projects\/#\/schema\/person\/51e717c68f4f5917c63baf88f0896c39"},"headline":"Mixing different versions of .net &#8211; 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