diff --git a/src/Directory.Build.props b/src/Directory.Build.props
index 21be76a9e..5758c4936 100644
--- a/src/Directory.Build.props
+++ b/src/Directory.Build.props
@@ -5,7 +5,8 @@
     <PackageProjectUrl>https://csharp.sdk.modelcontextprotocol.io</PackageProjectUrl>
     <RepositoryUrl>https://github.com/modelcontextprotocol/csharp-sdk</RepositoryUrl>
     <RepositoryType>git</RepositoryType>
-    <VersionPrefix>1.3.0</VersionPrefix>
+    <VersionPrefix>2.0.0</VersionPrefix>
+    <VersionSuffix>preview.1</VersionSuffix>
     <Authors>ModelContextProtocol</Authors>
     <Copyright>© Model Context Protocol a Series of LF Projects, LLC.</Copyright>
     <PackageTags>ModelContextProtocol;mcp;ai;llm</PackageTags>
@@ -17,7 +18,7 @@
     <AssemblyOriginatorKeyFile>$(RepoRoot)\Open.snk</AssemblyOriginatorKeyFile>
     <SignAssembly>true</SignAssembly>
     <EnablePackageValidation>true</EnablePackageValidation>
-    <PackageValidationBaselineVersion>1.0.0</PackageValidationBaselineVersion>
+    <PackageValidationBaselineVersion>1.3.0</PackageValidationBaselineVersion>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/ModelContextProtocol.Core/CompatibilitySuppressions.xml b/src/ModelContextProtocol.Core/CompatibilitySuppressions.xml
deleted file mode 100644
index 640351668..000000000
--- a/src/ModelContextProtocol.Core/CompatibilitySuppressions.xml
+++ /dev/null
@@ -1,60 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- https://learn.microsoft.com/dotnet/fundamentals/package-validation/diagnostic-ids -->
-<Suppressions xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
-  <Suppression>
-    <DiagnosticId>CP0005</DiagnosticId>
-    <Target>M:ModelContextProtocol.Client.McpClient.get_Completion</Target>
-    <Left>lib/net10.0/ModelContextProtocol.Core.dll</Left>
-    <Right>lib/net10.0/ModelContextProtocol.Core.dll</Right>
-    <IsBaselineSuppression>true</IsBaselineSuppression>
-  </Suppression>
-  <Suppression>
-    <DiagnosticId>CP0005</DiagnosticId>
-    <Target>P:ModelContextProtocol.Client.McpClient.Completion</Target>
-    <Left>lib/net10.0/ModelContextProtocol.Core.dll</Left>
-    <Right>lib/net10.0/ModelContextProtocol.Core.dll</Right>
-    <IsBaselineSuppression>true</IsBaselineSuppression>
-  </Suppression>
-  <Suppression>
-    <DiagnosticId>CP0005</DiagnosticId>
-    <Target>M:ModelContextProtocol.Client.McpClient.get_Completion</Target>
-    <Left>lib/net8.0/ModelContextProtocol.Core.dll</Left>
-    <Right>lib/net8.0/ModelContextProtocol.Core.dll</Right>
-    <IsBaselineSuppression>true</IsBaselineSuppression>
-  </Suppression>
-  <Suppression>
-    <DiagnosticId>CP0005</DiagnosticId>
-    <Target>P:ModelContextProtocol.Client.McpClient.Completion</Target>
-    <Left>lib/net8.0/ModelContextProtocol.Core.dll</Left>
-    <Right>lib/net8.0/ModelContextProtocol.Core.dll</Right>
-    <IsBaselineSuppression>true</IsBaselineSuppression>
-  </Suppression>
-  <Suppression>
-    <DiagnosticId>CP0005</DiagnosticId>
-    <Target>M:ModelContextProtocol.Client.McpClient.get_Completion</Target>
-    <Left>lib/net9.0/ModelContextProtocol.Core.dll</Left>
-    <Right>lib/net9.0/ModelContextProtocol.Core.dll</Right>
-    <IsBaselineSuppression>true</IsBaselineSuppression>
-  </Suppression>
-  <Suppression>
-    <DiagnosticId>CP0005</DiagnosticId>
-    <Target>P:ModelContextProtocol.Client.McpClient.Completion</Target>
-    <Left>lib/net9.0/ModelContextProtocol.Core.dll</Left>
-    <Right>lib/net9.0/ModelContextProtocol.Core.dll</Right>
-    <IsBaselineSuppression>true</IsBaselineSuppression>
-  </Suppression>
-  <Suppression>
-    <DiagnosticId>CP0005</DiagnosticId>
-    <Target>M:ModelContextProtocol.Client.McpClient.get_Completion</Target>
-    <Left>lib/netstandard2.0/ModelContextProtocol.Core.dll</Left>
-    <Right>lib/netstandard2.0/ModelContextProtocol.Core.dll</Right>
-    <IsBaselineSuppression>true</IsBaselineSuppression>
-  </Suppression>
-  <Suppression>
-    <DiagnosticId>CP0005</DiagnosticId>
-    <Target>P:ModelContextProtocol.Client.McpClient.Completion</Target>
-    <Left>lib/netstandard2.0/ModelContextProtocol.Core.dll</Left>
-    <Right>lib/netstandard2.0/ModelContextProtocol.Core.dll</Right>
-    <IsBaselineSuppression>true</IsBaselineSuppression>
-  </Suppression>
-</Suppressions>
\ No newline at end of file